diff --git a/.vscode/ftp-kr.diff._tmp_mail_name_check.php b/.vscode/ftp-kr.diff._tmp_mail_name_check.php
new file mode 100644
index 0000000..9088476
--- /dev/null
+++ b/.vscode/ftp-kr.diff._tmp_mail_name_check.php
@@ -0,0 +1 @@
+c:\visual studio code\projekty\crmPRO\_tmp_mail_name_check.php
\ No newline at end of file
diff --git a/VIDOK_Instrukcja Montażu I Uruchomienia - Wyroby Elektryczne.pdf b/VIDOK_Instrukcja Montażu I Uruchomienia - Wyroby Elektryczne.pdf
new file mode 100644
index 0000000..066c4aa
Binary files /dev/null and b/VIDOK_Instrukcja Montażu I Uruchomienia - Wyroby Elektryczne.pdf differ
diff --git a/autoload/Domain/Tasks/MailToTaskImporter.php b/autoload/Domain/Tasks/MailToTaskImporter.php
index 7973888..ce491a2 100644
--- a/autoload/Domain/Tasks/MailToTaskImporter.php
+++ b/autoload/Domain/Tasks/MailToTaskImporter.php
@@ -204,7 +204,11 @@ class MailToTaskImporter
         // Zapisz normalne załączniki
         foreach ( $content['attachments'] as $attachment )
         {
-          $att_name = $attachment['name'];
+          $att_name = self::normalizeImportedAttachmentName(
+            isset( $attachment['name'] ) ? $attachment['name'] : '',
+            isset( $attachment['mime'] ) ? $attachment['mime'] : '',
+            isset( $attachment['content'] ) ? $attachment['content'] : null
+          );
           $att_mime = isset( $attachment['mime'] ) ? $attachment['mime'] : '';
 
           // Jeśli nazwa nie ma rozszerzenia, dodaj je z MIME type
@@ -359,17 +363,82 @@ class MailToTaskImporter
     if ( $value === '' )
       return '';
 
+    if ( !function_exists( 'imap_mime_header_decode' ) )
+      return trim( $this -> convertTextToUtf8( $value ) );
+
     $chunks = @imap_mime_header_decode( $value );
     if ( !is_array( $chunks ) or !count( $chunks ) )
-      return trim( $value );
+      return trim( $this -> convertTextToUtf8( $value ) );
 
     $decoded = '';
     foreach ( $chunks as $chunk )
-      $decoded .= isset( $chunk -> text ) ? $chunk -> text : '';
+    {
+      $chunk_text = isset( $chunk -> text ) ? (string)$chunk -> text : '';
+      $chunk_charset = isset( $chunk -> charset ) ? (string)$chunk -> charset : '';
+      $decoded .= $this -> convertTextToUtf8( $chunk_text, $chunk_charset );
+    }
 
     return trim( $decoded );
   }
 
+  private function convertTextToUtf8( $text, $source_charset = '' )
+  {
+    $text = (string)$text;
+    if ( $text === '' )
+      return '';
+
+    if ( preg_match( '//u', $text ) )
+      return $text;
+
+    $source_charset = strtoupper( trim( (string)$source_charset ) );
+    $aliases = [
+      'DEFAULT' => '',
+      'UNKNOWN-8BIT' => '',
+      'X-UNKNOWN' => '',
+      'UTF8' => 'UTF-8',
+      'UTF-8' => 'UTF-8',
+      'ISO-8859-2' => 'ISO-8859-2',
+      'ISO8859-2' => 'ISO-8859-2',
+      'WINDOWS-1250' => 'Windows-1250',
+      'CP1250' => 'Windows-1250',
+      'WINDOWS-1252' => 'Windows-1252',
+      'CP1252' => 'Windows-1252'
+    ];
+
+    $candidates = [];
+    if ( isset( $aliases[$source_charset] ) && $aliases[$source_charset] !== '' )
+      $candidates[] = $aliases[$source_charset];
+
+    $candidates = array_merge( $candidates, [ 'Windows-1250', 'ISO-8859-2', 'Windows-1252', 'ISO-8859-1' ] );
+    $candidates = array_values( array_unique( $candidates ) );
+
+    foreach ( $candidates as $encoding )
+    {
+      if ( function_exists( 'mb_convert_encoding' ) )
+      {
+        $converted = @mb_convert_encoding( $text, 'UTF-8', $encoding );
+        if ( is_string( $converted ) && $converted !== '' && preg_match( '//u', $converted ) )
+          return $converted;
+      }
+
+      if ( function_exists( 'iconv' ) )
+      {
+        $converted = @iconv( $encoding, 'UTF-8//IGNORE', $text );
+        if ( is_string( $converted ) && $converted !== '' && preg_match( '//u', $converted ) )
+          return $converted;
+      }
+    }
+
+    if ( function_exists( 'mb_convert_encoding' ) )
+    {
+      $converted = @mb_convert_encoding( $text, 'UTF-8', 'UTF-8' );
+      if ( is_string( $converted ) && $converted !== '' )
+        return $converted;
+    }
+
+    return @iconv( 'UTF-8', 'UTF-8//IGNORE', $text ) ?: $text;
+  }
+
   private function messageKey( $header, $sender, $subject, $message_no )
   {
     $message_id = '';
@@ -434,7 +503,7 @@ class MailToTaskImporter
     $structure = @imap_fetchstructure( $imap, $message_no );
 
     $parts = [];
-    $this -> flattenParts( $imap, $message_no, $structure, '', $parts );
+    $this -> flattenParts( $imap, $message_no, $structure, '', $parts, [] );
 
     $plain = '';
     $html = '';
@@ -472,7 +541,9 @@ class MailToTaskImporter
         continue;
       }
 
-      if ( !$this -> shouldImportAttachment( $part, $cid_refs ) )
+      $should_import = $this -> shouldImportAttachment( $part, $cid_refs );
+
+      if ( !$should_import )
         continue;
 
       $attachments[] = [
@@ -493,7 +564,7 @@ class MailToTaskImporter
     ];
   }
 
-  private function flattenParts( $imap, $message_no, $structure, $prefix, array &$parts )
+  private function flattenParts( $imap, $message_no, $structure, $prefix, array &$parts, array $parent_context = [] )
   {
     if ( !$structure )
     {
@@ -510,21 +581,24 @@ class MailToTaskImporter
     if ( !isset( $structure -> parts ) or !is_array( $structure -> parts ) or !count( $structure -> parts ) )
     {
       $part_number = $prefix !== '' ? $prefix : null;
-      $parts[] = $this -> parseSinglePart( $imap, $message_no, $structure, $part_number );
+      $parts[] = $this -> parseSinglePart( $imap, $message_no, $structure, $part_number, $parent_context );
       return;
     }
 
+    $current_context = $this -> mergePartContexts( $parent_context, $this -> extractPartContext( $structure ) );
+
     foreach ( $structure -> parts as $index => $subpart )
     {
       $part_number = $prefix === '' ? (string)( $index + 1 ) : $prefix . '.' . ( $index + 1 );
+      $child_context = $this -> mergePartContexts( $current_context, $this -> extractPartContext( $subpart ) );
       if ( isset( $subpart -> parts ) and is_array( $subpart -> parts ) and count( $subpart -> parts ) )
-        $this -> flattenParts( $imap, $message_no, $subpart, $part_number, $parts );
+        $this -> flattenParts( $imap, $message_no, $subpart, $part_number, $parts, $child_context );
       else
-        $parts[] = $this -> parseSinglePart( $imap, $message_no, $subpart, $part_number );
+        $parts[] = $this -> parseSinglePart( $imap, $message_no, $subpart, $part_number, $child_context );
     }
   }
 
-  private function parseSinglePart( $imap, $message_no, $part, $part_number )
+  private function parseSinglePart( $imap, $message_no, $part, $part_number, array $context = [] )
   {
     $raw = '';
     if ( $part_number === null )
@@ -539,31 +613,44 @@ class MailToTaskImporter
 
     $params = $this -> partParams( $part );
 
-    $name = '';
-    if ( isset( $params['filename'] ) )
-      $name = $params['filename'];
-    elseif ( isset( $params['name'] ) )
-      $name = $params['name'];
+    $filename_param = isset( $params['filename'] ) ? $this -> decodeHeaderValue( $params['filename'] ) : '';
+    $name_param = isset( $params['name'] ) ? $this -> decodeHeaderValue( $params['name'] ) : '';
+    $description_param = isset( $params['description'] ) ? $this -> decodeHeaderValue( $params['description'] ) : '';
+    $name = $this -> pickBetterAttachmentName( $filename_param, $name_param );
+    $name = $this -> pickBetterAttachmentName( $name, $description_param );
 
-    $name = $this -> decodeHeaderValue( $name );
+    if ( isset( $part -> description ) && trim( (string)$part -> description ) !== '' )
+      $name = $this -> pickBetterAttachmentName( $name, $this -> decodeHeaderValue( (string)$part -> description ) );
 
-    // Fallback: jeśli brak nazwy lub brak rozszerzenia, spróbuj z surowych nagłówków MIME
-    if ( $part_number !== null && ( trim( $name ) === '' || pathinfo( $name, PATHINFO_EXTENSION ) === '' ) )
+    if ( isset( $context['name'] ) && trim( (string)$context['name'] ) !== '' )
+      $name = $this -> pickBetterAttachmentName( $name, (string)$context['name'] );
+
+    // Fallback: jeśli brak nazwy, brak rozszerzenia lub nazwa techniczna, spróbuj z surowych nagłówków MIME
+    if ( $part_number !== null && ( trim( $name ) === '' || pathinfo( $name, PATHINFO_EXTENSION ) === '' || self::isTechnicalAttachmentName( $name ) ) )
     {
       $mime_name = $this -> extractNameFromRawMime( $imap, $message_no, $part_number );
       if ( $mime_name !== '' )
         $name = $mime_name;
     }
 
+    $name = self::normalizeImportedAttachmentName( $name, $mime, $decoded );
+
     $disposition = isset( $part -> disposition ) ? strtoupper( trim( (string)$part -> disposition ) ) : '';
+    if ( $disposition === '' && isset( $context['disposition'] ) )
+      $disposition = strtoupper( trim( (string)$context['disposition'] ) );
+
     $content_id = '';
     if ( isset( $part -> id ) and trim( (string)$part -> id ) !== '' )
       $content_id = $this -> normalizeContentId( (string)$part -> id );
     elseif ( isset( $params['content-id'] ) and trim( (string)$params['content-id'] ) !== '' )
       $content_id = $this -> normalizeContentId( (string)$params['content-id'] );
+    elseif ( isset( $context['content_id'] ) )
+      $content_id = $this -> normalizeContentId( (string)$context['content_id'] );
 
     $is_inline = $disposition === 'INLINE' or $content_id !== '';
-    $is_attachment = trim( $name ) !== '' or $disposition === 'ATTACHMENT';
+    $is_attachment = trim( $name ) !== ''
+      or $disposition === 'ATTACHMENT'
+      or $this -> isLikelyBinaryAttachmentWithoutName( $mime, $decoded, $disposition, $content_id );
 
     return [
       'mime' => $mime,
@@ -641,10 +728,22 @@ class MailToTaskImporter
 
   private function extractNameFromRawMime( $imap, $message_no, $part_number )
   {
-    $headers = (string)@imap_fetchmime( $imap, $message_no, $part_number, FT_PEEK );
+    $headers = $this -> fetchRawMimeHeaders( $imap, $message_no, $part_number );
+
     if ( trim( $headers ) === '' )
       return '';
 
+    return $this -> extractNameFromMimeHeaders( $headers );
+  }
+
+  private function extractNameFromMimeHeaders( $headers )
+  {
+    $headers = (string)$headers;
+    if ( trim( $headers ) === '' )
+      return '';
+
+    $best_name = '';
+
     // Szukaj filename w Content-Disposition, potem name w Content-Type
     foreach ( [ 'filename', 'name' ] as $param_name )
     {
@@ -667,8 +766,8 @@ class MailToTaskImporter
               $decoded = @mb_convert_encoding( $decoded, 'UTF-8', $charset );
             $combined = $decoded;
           }
-          if ( trim( $combined ) !== '' && pathinfo( $combined, PATHINFO_EXTENSION ) !== '' )
-            return trim( $combined );
+          if ( trim( $combined ) !== '' )
+            $best_name = $this -> pickBetterAttachmentName( $best_name, trim( $combined ) );
         }
       }
 
@@ -684,27 +783,109 @@ class MailToTaskImporter
             $decoded = @mb_convert_encoding( $decoded, 'UTF-8', $charset );
           $val = $decoded;
         }
-        if ( trim( $val ) !== '' && pathinfo( $val, PATHINFO_EXTENSION ) !== '' )
-          return trim( $val );
+        if ( trim( $val ) !== '' )
+          $best_name = $this -> pickBetterAttachmentName( $best_name, trim( $val ) );
       }
 
       // Standardowy: param="value" lub param=value
       if ( preg_match( '/' . preg_quote( $param_name, '/' ) . '\s*=\s*"([^"]+)"/i', $headers, $m ) )
       {
         $val = $this -> decodeHeaderValue( trim( $m[1] ) );
-        if ( trim( $val ) !== '' && pathinfo( $val, PATHINFO_EXTENSION ) !== '' )
-          return trim( $val );
+        if ( trim( $val ) !== '' )
+          $best_name = $this -> pickBetterAttachmentName( $best_name, trim( $val ) );
       }
 
       if ( preg_match( '/' . preg_quote( $param_name, '/' ) . '\s*=\s*([^\s;]+)/i', $headers, $m ) )
       {
         $val = $this -> decodeHeaderValue( trim( $m[1], " \t\"'" ) );
-        if ( trim( $val ) !== '' && pathinfo( $val, PATHINFO_EXTENSION ) !== '' )
-          return trim( $val );
+        if ( trim( $val ) !== '' )
+          $best_name = $this -> pickBetterAttachmentName( $best_name, trim( $val ) );
+      }
+
+      // Wartość bez cudzysłowów, ale ze spacjami aż do końca linii lub średnika
+      if ( preg_match( '/' . preg_quote( $param_name, '/' ) . '\s*=\s*([^;\r\n]+)/i', $headers, $m ) )
+      {
+        $val = $this -> decodeHeaderValue( trim( $m[1], " \t\"'" ) );
+        if ( trim( $val ) !== '' )
+          $best_name = $this -> pickBetterAttachmentName( $best_name, trim( $val ) );
       }
     }
 
-    return '';
+    if ( preg_match( '/^\s*content-description\s*:\s*(.+)$/im', $headers, $m ) )
+    {
+      $val = $this -> decodeHeaderValue( trim( $m[1] ) );
+      if ( trim( $val ) !== '' )
+        $best_name = $this -> pickBetterAttachmentName( $best_name, trim( $val ) );
+    }
+
+    return trim( $best_name );
+  }
+
+  public function debugExtractNameFromMimeHeaders( $headers )
+  {
+    return $this -> extractNameFromMimeHeaders( $headers );
+  }
+
+  private function extractPartContext( $part )
+  {
+    if ( !$part )
+      return [];
+
+    $params = $this -> partParams( $part );
+    $filename_param = isset( $params['filename'] ) ? $this -> decodeHeaderValue( $params['filename'] ) : '';
+    $name_param = isset( $params['name'] ) ? $this -> decodeHeaderValue( $params['name'] ) : '';
+    $description_param = isset( $params['description'] ) ? $this -> decodeHeaderValue( $params['description'] ) : '';
+
+    $name = $this -> pickBetterAttachmentName( $filename_param, $name_param );
+    $name = $this -> pickBetterAttachmentName( $name, $description_param );
+    if ( isset( $part -> description ) && trim( (string)$part -> description ) !== '' )
+      $name = $this -> pickBetterAttachmentName( $name, $this -> decodeHeaderValue( (string)$part -> description ) );
+    $disposition = isset( $part -> disposition ) ? strtoupper( trim( (string)$part -> disposition ) ) : '';
+
+    $content_id = '';
+    if ( isset( $part -> id ) and trim( (string)$part -> id ) !== '' )
+      $content_id = $this -> normalizeContentId( (string)$part -> id );
+    elseif ( isset( $params['content-id'] ) and trim( (string)$params['content-id'] ) !== '' )
+      $content_id = $this -> normalizeContentId( (string)$params['content-id'] );
+
+    return [
+      'name' => $name,
+      'disposition' => $disposition,
+      'content_id' => $content_id
+    ];
+  }
+
+  private function mergePartContexts( array $parent_context, array $child_context )
+  {
+    $merged = $parent_context;
+
+    $parent_name = isset( $parent_context['name'] ) ? (string)$parent_context['name'] : '';
+    $child_name = isset( $child_context['name'] ) ? (string)$child_context['name'] : '';
+    $merged['name'] = $this -> pickBetterAttachmentName( $parent_name, $child_name );
+
+    if ( isset( $child_context['disposition'] ) && trim( (string)$child_context['disposition'] ) !== '' )
+      $merged['disposition'] = (string)$child_context['disposition'];
+    elseif ( isset( $parent_context['disposition'] ) )
+      $merged['disposition'] = (string)$parent_context['disposition'];
+
+    if ( isset( $child_context['content_id'] ) && trim( (string)$child_context['content_id'] ) !== '' )
+      $merged['content_id'] = (string)$child_context['content_id'];
+    elseif ( isset( $parent_context['content_id'] ) )
+      $merged['content_id'] = (string)$parent_context['content_id'];
+
+    return $merged;
+  }
+
+  private function fetchRawMimeHeaders( $imap, $message_no, $part_number )
+  {
+    if ( $part_number === null )
+      return '';
+
+    $headers = (string)@imap_fetchmime( $imap, $message_no, $part_number, FT_PEEK );
+    if ( trim( $headers ) === '' )
+      $headers = (string)@imap_fetchbody( $imap, $message_no, $part_number . '.MIME', FT_PEEK );
+
+    return (string)$headers;
   }
 
   private function decodePartBody( $raw, $encoding )
@@ -838,12 +1019,10 @@ class MailToTaskImporter
   private function shouldImportAttachment( array $part, array $cid_refs )
   {
     $name = trim( isset( $part['name'] ) ? (string)$part['name'] : '' );
-    if ( $name === '' )
-      return false;
-
     $mime = strtolower( isset( $part['mime'] ) ? (string)$part['mime'] : '' );
     $disposition = strtoupper( isset( $part['disposition'] ) ? (string)$part['disposition'] : '' );
     $content_id = $this -> normalizeContentId( isset( $part['content_id'] ) ? (string)$part['content_id'] : '' );
+    $body = isset( $part['body'] ) ? (string)$part['body'] : '';
 
     if ( !empty( $part['is_inline'] ) )
       return false;
@@ -857,7 +1036,51 @@ class MailToTaskImporter
     if ( strpos( $mime, 'image/' ) === 0 and $disposition !== 'ATTACHMENT' )
       return false;
 
-    return true;
+    if ( $name !== '' )
+      return true;
+
+    if ( $disposition === 'ATTACHMENT' )
+      return true;
+
+    if ( $mime === 'application/pdf' or $mime === 'application/x-pdf' )
+      return true;
+
+    if ( $mime === 'application/octet-stream' and self::contentLooksLikePdf( $body ) )
+      return true;
+
+    return false;
+  }
+
+  private function isLikelyBinaryAttachmentWithoutName( $mime, $content, $disposition, $content_id )
+  {
+    $mime = strtolower( trim( (string)$mime ) );
+    $disposition = strtoupper( trim( (string)$disposition ) );
+    $content_id = trim( (string)$content_id );
+
+    if ( strpos( $mime, 'text/' ) === 0 )
+      return false;
+
+    if ( $content_id !== '' )
+      return false;
+
+    if ( strpos( $mime, 'image/' ) === 0 && $disposition !== 'ATTACHMENT' )
+      return false;
+
+    if ( $mime === 'application/pdf' || $mime === 'application/x-pdf' )
+      return true;
+
+    if ( $mime === 'application/octet-stream' && self::contentLooksLikePdf( $content ) )
+      return true;
+
+    return false;
+  }
+
+  private static function contentLooksLikePdf( $content )
+  {
+    if ( !is_string( $content ) || $content === '' )
+      return false;
+
+    return strpos( substr( $content, 0, 1024 ), '%PDF-' ) !== false;
   }
 
   private function extractReferencedCidValues( $html )
@@ -1213,6 +1436,136 @@ class MailToTaskImporter
     return isset( $map[$mime] ) ? $map[$mime] : '';
   }
 
+  private function pickBetterAttachmentName( $primary, $secondary )
+  {
+    $primary = trim( (string)$primary );
+    $secondary = trim( (string)$secondary );
+
+    if ( $primary === '' )
+      return $secondary;
+
+    if ( $secondary === '' )
+      return $primary;
+
+    $primary_score = self::attachmentNameScore( $primary );
+    $secondary_score = self::attachmentNameScore( $secondary );
+
+    return $secondary_score > $primary_score ? $secondary : $primary;
+  }
+
+  public static function normalizeImportedAttachmentName( $name, $mime = '', $content = null )
+  {
+    $name = trim( (string)$name );
+    $technical_ext = '';
+
+    if ( self::isTechnicalAttachmentName( $name ) )
+    {
+      $technical_ext = strtolower( pathinfo( $name, PATHINFO_EXTENSION ) );
+      $name = '';
+    }
+
+    if ( $name === '' )
+      $name = 'zalacznik';
+
+    $ext = strtolower( pathinfo( $name, PATHINFO_EXTENSION ) );
+    if ( $ext === '' )
+    {
+      $mime_ext = self::extensionFromMimeStatic( $mime );
+      if ( $mime_ext === '' && $technical_ext !== '' )
+        $mime_ext = $technical_ext;
+      if ( $mime_ext === '' )
+        $mime_ext = self::extensionFromContent( $content );
+      if ( $mime_ext !== '' )
+        $name .= '.' . $mime_ext;
+    }
+
+    return $name;
+  }
+
+  private static function attachmentNameScore( $name )
+  {
+    $name = trim( (string)$name );
+    if ( $name === '' )
+      return -1;
+
+    $score = 1;
+    if ( pathinfo( $name, PATHINFO_EXTENSION ) !== '' )
+      $score += 2;
+
+    if ( self::isTechnicalAttachmentName( $name ) )
+      $score -= 3;
+
+    return $score;
+  }
+
+  private static function isTechnicalAttachmentName( $name )
+  {
+    $name = trim( (string)$name );
+    if ( $name === '' )
+      return false;
+
+    return (bool)preg_match( '/^att_[a-f0-9]{8,}(?:\.[a-z0-9]{2,6})?$/i', $name );
+  }
+
+  private static function extensionFromMimeStatic( $mime )
+  {
+    $map = [
+      'application/pdf' => 'pdf',
+      'application/zip' => 'zip',
+      'application/x-rar-compressed' => 'rar',
+      'application/vnd.rar' => 'rar',
+      'application/x-7z-compressed' => '7z',
+      'application/msword' => 'doc',
+      'application/vnd.openxmlformats-officedocument.wordprocessingml.document' => 'docx',
+      'application/vnd.ms-excel' => 'xls',
+      'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' => 'xlsx',
+      'application/vnd.ms-powerpoint' => 'ppt',
+      'application/vnd.openxmlformats-officedocument.presentationml.presentation' => 'pptx',
+      'application/xml' => 'xml',
+      'application/json' => 'json',
+      'application/rtf' => 'rtf',
+      'application/octet-stream' => '',
+      'text/plain' => 'txt',
+      'text/html' => 'html',
+      'text/csv' => 'csv',
+      'image/jpeg' => 'jpg',
+      'image/png' => 'png',
+      'image/gif' => 'gif',
+      'image/webp' => 'webp',
+      'image/bmp' => 'bmp',
+      'image/svg+xml' => 'svg',
+      'image/tiff' => 'tiff'
+    ];
+
+    $mime = strtolower( trim( (string)$mime ) );
+    return isset( $map[$mime] ) ? $map[$mime] : '';
+  }
+
+  private static function extensionFromContent( $content )
+  {
+    if ( !is_string( $content ) || $content === '' )
+      return '';
+
+    $prefix = substr( $content, 0, 16 );
+
+    if ( substr( $prefix, 0, 4 ) === '%PDF' )
+      return 'pdf';
+
+    if ( substr( $prefix, 0, 2 ) === 'PK' )
+      return 'zip';
+
+    if ( substr( $prefix, 0, 3 ) === "\xFF\xD8\xFF" )
+      return 'jpg';
+
+    if ( substr( $prefix, 0, 8 ) === "\x89PNG\r\n\x1A\n" )
+      return 'png';
+
+    if ( substr( $prefix, 0, 6 ) === 'GIF87a' || substr( $prefix, 0, 6 ) === 'GIF89a' )
+      return 'gif';
+
+    return '';
+  }
+
   private function replaceCidReferences( $html, array $cid_to_url )
   {
     if ( trim( (string)$html ) === '' || empty( $cid_to_url ) )
diff --git a/autoload/Domain/Tasks/TaskAttachmentRepository.php b/autoload/Domain/Tasks/TaskAttachmentRepository.php
index 0bdf184..eeefcf1 100644
--- a/autoload/Domain/Tasks/TaskAttachmentRepository.php
+++ b/autoload/Domain/Tasks/TaskAttachmentRepository.php
@@ -35,7 +35,12 @@ class TaskAttachmentRepository
 
     foreach ( $rows as &$row )
     {
-      $row['title_effective'] = self::effectiveTitle( $row['title'], $row['original_name'] );
+      $row['title_effective'] = self::effectiveTitleWithExtension(
+        isset( $row['title'] ) ? $row['title'] : null,
+        isset( $row['original_name'] ) ? $row['original_name'] : '',
+        isset( $row['file_ext'] ) ? $row['file_ext'] : '',
+        isset( $row['stored_name'] ) ? $row['stored_name'] : ''
+      );
       $row['url'] = $this -> buildPublicUrl( $row['relative_path'], $row['stored_name'] );
       $row['size_human'] = $this -> formatSize( (int)$row['file_size'] );
     }
@@ -59,6 +64,15 @@ class TaskAttachmentRepository
 
     $safe_original_name = self::sanitizeFileName( $original_name );
     $ext = strtolower( pathinfo( $safe_original_name, PATHINFO_EXTENSION ) );
+    if ( $ext === '' && isset( $file['tmp_name'] ) && is_string( $file['tmp_name'] ) && file_exists( $file['tmp_name'] ) )
+    {
+      $detected_ext = self::detectExtensionFromContent( @file_get_contents( $file['tmp_name'] ) );
+      if ( $detected_ext !== '' )
+      {
+        $ext = $detected_ext;
+        $safe_original_name .= '.' . $ext;
+      }
+    }
     $stored_name = uniqid( 'att_', true ) . ( $ext ? '.' . $ext : '' );
 
     $relative_path = date( 'Y' ) . '/' . date( 'm' );
@@ -83,6 +97,15 @@ class TaskAttachmentRepository
 
     $safe_original_name = self::sanitizeFileName( $original_name );
     $ext = strtolower( pathinfo( $safe_original_name, PATHINFO_EXTENSION ) );
+    if ( $ext === '' )
+    {
+      $detected_ext = self::detectExtensionFromContent( (string)$content );
+      if ( $detected_ext !== '' )
+      {
+        $ext = $detected_ext;
+        $safe_original_name .= '.' . $ext;
+      }
+    }
     $stored_name = uniqid( 'att_', true ) . ( $ext ? '.' . $ext : '' );
 
     $relative_path = date( 'Y' ) . '/' . date( 'm' );
@@ -162,14 +185,89 @@ class TaskAttachmentRepository
     return $title !== '' ? $title : (string)$fallback;
   }
 
+  public static function effectiveTitleWithExtension( $title, $fallback, $file_ext = '', $stored_name = '' )
+  {
+    $title = trim( (string)$title );
+    $fallback = trim( (string)$fallback );
+
+    if ( self::isGenericAttachmentTitle( $title ) && $fallback !== '' && !self::isGenericAttachmentTitle( $fallback ) )
+      $effective = $fallback;
+    else
+      $effective = self::effectiveTitle( $title, $fallback );
+
+    if ( pathinfo( $effective, PATHINFO_EXTENSION ) !== '' )
+      return $effective;
+
+    $file_ext = strtolower( trim( (string)$file_ext ) );
+    if ( $file_ext === '' )
+      $file_ext = strtolower( pathinfo( (string)$stored_name, PATHINFO_EXTENSION ) );
+
+    if ( $file_ext !== '' )
+      return $effective . '.' . $file_ext;
+
+    return $effective;
+  }
+
+  private static function isGenericAttachmentTitle( $name )
+  {
+    $name = strtolower( trim( (string)$name ) );
+    if ( $name === '' )
+      return false;
+
+    return (bool)preg_match( '/^zalacznik(?:\.[a-z0-9]{2,6})?$/i', $name );
+  }
+
   public static function sanitizeFileName( $name )
   {
+    $name = (string)$name;
+    if ( $name !== '' && !preg_match( '//u', $name ) )
+    {
+      if ( function_exists( 'mb_convert_encoding' ) )
+      {
+        $converted = @mb_convert_encoding( $name, 'UTF-8', 'Windows-1250,ISO-8859-2,Windows-1252,ISO-8859-1' );
+        if ( is_string( $converted ) && $converted !== '' )
+          $name = $converted;
+      }
+
+      if ( !preg_match( '//u', $name ) && function_exists( 'iconv' ) )
+      {
+        $converted = @iconv( 'Windows-1250', 'UTF-8//IGNORE', $name );
+        if ( is_string( $converted ) && $converted !== '' )
+          $name = $converted;
+      }
+    }
+
     $name = preg_replace( '/[^\p{L}\p{N}\s\.\-_]+/u', '_', (string)$name );
     $name = preg_replace( '/\s+/', '_', $name );
     $name = trim( $name, '._-' );
     return $name !== '' ? $name : 'zalacznik';
   }
 
+  public static function detectExtensionFromContent( $content )
+  {
+    if ( !is_string( $content ) || $content === '' )
+      return '';
+
+    $sample = substr( $content, 0, 4096 );
+
+    if ( strpos( $sample, '%PDF-' ) !== false )
+      return 'pdf';
+
+    if ( substr( $sample, 0, 8 ) === "\x89PNG\r\n\x1A\n" )
+      return 'png';
+
+    if ( substr( $sample, 0, 3 ) === "\xFF\xD8\xFF" )
+      return 'jpg';
+
+    if ( substr( $sample, 0, 6 ) === 'GIF87a' || substr( $sample, 0, 6 ) === 'GIF89a' )
+      return 'gif';
+
+    if ( substr( $sample, 0, 2 ) === 'PK' )
+      return 'zip';
+
+    return '';
+  }
+
   private function ensureStorage()
   {
     if ( !is_dir( $this -> upload_dir ) )
diff --git a/tests/Domain/Tasks/MailToTaskImporterTest.php b/tests/Domain/Tasks/MailToTaskImporterTest.php
new file mode 100644
index 0000000..a7e6638
--- /dev/null
+++ b/tests/Domain/Tasks/MailToTaskImporterTest.php
@@ -0,0 +1,85 @@
+<?php
+
+require_once __DIR__ . '/../../../autoload/Domain/Tasks/MailToTaskImporter.php';
+
+use Domain\Tasks\MailToTaskImporter;
+
+function run_mail_to_task_importer_tests()
+{
+  $importer = new MailToTaskImporter( null );
+
+  $normalized_pdf = MailToTaskImporter::normalizeImportedAttachmentName( 'att_6995b8ad9d4567', 'application/pdf' );
+  assert_true(
+    $normalized_pdf === 'zalacznik.pdf',
+    'Expected technical att_* name to be normalized to readable fallback with MIME extension.'
+  );
+
+  $normalized_named = MailToTaskImporter::normalizeImportedAttachmentName( 'faktura_01_2026.pdf', 'application/pdf' );
+  assert_true(
+    $normalized_named === 'faktura_01_2026.pdf',
+    'Expected normal file name to stay unchanged.'
+  );
+
+  $normalized_without_ext = MailToTaskImporter::normalizeImportedAttachmentName( 'umowa_final', 'application/pdf' );
+  assert_true(
+    $normalized_without_ext === 'umowa_final.pdf',
+    'Expected missing extension to be appended from MIME type.'
+  );
+
+  $normalized_from_content = MailToTaskImporter::normalizeImportedAttachmentName(
+    'att_6995b8ad9d4567',
+    'application/octet-stream',
+    "%PDF-1.7\nexample"
+  );
+  assert_true(
+    $normalized_from_content === 'zalacznik.pdf',
+    'Expected PDF extension to be detected from file content when MIME is generic.'
+  );
+
+  $normalized_technical_with_ext = MailToTaskImporter::normalizeImportedAttachmentName(
+    'att_6995b8ad9d4567.pdf',
+    'application/octet-stream'
+  );
+  assert_true(
+    $normalized_technical_with_ext === 'zalacznik.pdf',
+    'Expected technical name with extension to preserve extension in normalized fallback.'
+  );
+
+  $normalized_original_should_stay = MailToTaskImporter::normalizeImportedAttachmentName(
+    'VIDOK_Instrukcja Montażu I Uruchomienia - Wyroby Elektryczne.pdf',
+    'application/octet-stream'
+  );
+  assert_true(
+    $normalized_original_should_stay === 'VIDOK_Instrukcja Montażu I Uruchomienia - Wyroby Elektryczne.pdf',
+    'Expected original non-technical PDF name to be preserved as-is.'
+  );
+
+  $raw_headers = "Content-Type: application/octet-stream; name=VIDOK_Instrukcja Montażu I Uruchomienia - Wyroby Elektryczne.pdf\r\n"
+    . "Content-Disposition: attachment; filename=att_6995b8ad9d4567\r\n";
+
+  $parsed_name = $importer -> debugExtractNameFromMimeHeaders( $raw_headers );
+  assert_true(
+    $parsed_name === 'VIDOK_Instrukcja Montażu I Uruchomienia - Wyroby Elektryczne.pdf',
+    'Expected parser to keep full unquoted file name with spaces and prefer it over technical att_* name.'
+  );
+
+  $raw_headers_with_description = "Content-Type: application/octet-stream\r\n"
+    . "Content-Disposition: attachment; filename=att_6995b8ad9d4567\r\n"
+    . "Content-Description: VIDOK_Instrukcja Montażu I Uruchomienia - Wyroby Elektryczne.pdf\r\n";
+
+  $parsed_name_from_description = $importer -> debugExtractNameFromMimeHeaders( $raw_headers_with_description );
+  assert_true(
+    $parsed_name_from_description === 'VIDOK_Instrukcja Montażu I Uruchomienia - Wyroby Elektryczne.pdf',
+    'Expected parser to use Content-Description when filename is only technical att_*.'
+  );
+
+  $normalized_octet_pdf = MailToTaskImporter::normalizeImportedAttachmentName(
+    '',
+    'application/octet-stream',
+    "%PDF-1.6\n..."
+  );
+  assert_true(
+    $normalized_octet_pdf === 'zalacznik.pdf',
+    'Expected unnamed octet-stream with PDF signature to get pdf extension.'
+  );
+}
diff --git a/tests/Domain/Tasks/TaskAttachmentRepositoryTest.php b/tests/Domain/Tasks/TaskAttachmentRepositoryTest.php
index 2dd1b00..7b0e21f 100644
--- a/tests/Domain/Tasks/TaskAttachmentRepositoryTest.php
+++ b/tests/Domain/Tasks/TaskAttachmentRepositoryTest.php
@@ -25,4 +25,24 @@ function run_task_attachment_repository_tests()
       && substr( $sanitized, -4 ) === '.pdf',
     'Expected sanitized file name to remove unsupported characters and keep extension.'
   );
+
+  assert_true(
+    TaskAttachmentRepository::detectExtensionFromContent( "%PDF-1.7\nexample" ) === 'pdf',
+    'Expected PDF extension to be detected from binary content.'
+  );
+
+  assert_true(
+    TaskAttachmentRepository::effectiveTitleWithExtension( '', 'zalacznik', 'pdf', '' ) === 'zalacznik.pdf',
+    'Expected display title fallback to include file extension.'
+  );
+
+  assert_true(
+    TaskAttachmentRepository::effectiveTitleWithExtension(
+      'zalacznik.pdf',
+      'VIDOK_Instrukcja Montażu I Uruchomienia - Wyroby Elektryczne.pdf',
+      'pdf',
+      ''
+    ) === 'VIDOK_Instrukcja Montażu I Uruchomienia - Wyroby Elektryczne.pdf',
+    'Expected generic title to be ignored when original file name is available.'
+  );
 }
diff --git a/tests/run.php b/tests/run.php
index e0a7937..3f8d6f1 100644
--- a/tests/run.php
+++ b/tests/run.php
@@ -2,6 +2,7 @@
 
 require_once __DIR__ . '/Domain/Tasks/WorkTimeRepositoryTest.php';
 require_once __DIR__ . '/Domain/Tasks/TaskAttachmentRepositoryTest.php';
+require_once __DIR__ . '/Domain/Tasks/MailToTaskImporterTest.php';
 require_once __DIR__ . '/Domain/Users/UserRepositoryTest.php';
 require_once __DIR__ . '/Controllers/TasksControllerTest.php';
 require_once __DIR__ . '/Controllers/UsersControllerTest.php';
@@ -9,6 +10,7 @@ require_once __DIR__ . '/Controllers/UsersControllerTest.php';
 $tests = [
   'run_work_time_repository_tests',
   'run_task_attachment_repository_tests',
+  'run_mail_to_task_importer_tests',
   'run_user_repository_tests',
   'run_tasks_controller_tests',
   'run_users_controller_tests'