Attachment Validation
=====================

Rexpondo validates all attachments uploaded to tickets to prevent potentially harmful files from entering the system. Only file types explicitly listed below are accepted; all others are blocked automatically.

If an attachment is rejected, the system shows a message indicating the reason. If you need further assistance, contact your system administrator.


Allowed File Extensions
-----------------------

The following file extensions are allowed by default:

**Documents**
   ``pdf``, ``doc``, ``docx``, ``dot``, ``dotx``, ``xls``, ``xlsx``, ``ppt``, ``pptx``, ``ppsx``, ``odt``, ``ods``, ``odp``, ``odg``, ``txt``, ``csv``, ``rtf``, ``pub``, ``vsdx``, ``pages``

**Web and markup**
   ``html``, ``htm``, ``xhtml``, ``css``, ``xml``, ``json``, ``yaml``, ``yml``, ``md``

**Images**
   ``png``, ``jpg``, ``jpeg``, ``jfif``, ``gif``, ``bmp``, ``tiff``, ``tif``, ``svg``, ``webp``, ``ico``, ``heic``, ``heif``

**Archives**
   ``zip``, ``gz``, ``tar``, ``7z``, ``rar``, ``bz2``

**Audio and video**
   ``mp3``, ``mp4``, ``wav``, ``ogg``, ``avi``, ``mkv``, ``mov``, ``webm``

**Email and calendar**
   ``eml``, ``msg``, ``ics``, ``mht``, ``vcf``

**Certificates and signatures**
   ``p7s``, ``p7m``, ``asc``, ``pfx``, ``cer``, ``der``, ``pem``, ``crt``

**Other**
   ``log``, ``dat``


Allowed Content Types
---------------------

The following MIME content types are allowed by default:

**Documents**
   ``application/pdf``, ``application/msword``, ``application/rtf``, ``application/json``, ``application/xml``, ``text/plain``, ``text/csv``, ``text/html``, ``text/xml``, ``text/css``, ``text/markdown``, ``text/rtf``

**Microsoft Office**
   ``application/vnd.openxmlformats-officedocument.wordprocessingml.document``, ``application/vnd.openxmlformats-officedocument.spreadsheetml.sheet``, ``application/vnd.openxmlformats-officedocument.presentationml.presentation``, ``application/vnd.openxmlformats-officedocument.presentationml.slideshow``, ``application/vnd.ms-excel``, ``application/vnd.ms-powerpoint``, ``application/vnd.ms-visio.drawing``, ``application/vnd.ms-publisher``

**OpenDocument**
   ``application/vnd.oasis.opendocument.text``, ``application/vnd.oasis.opendocument.spreadsheet``, ``application/vnd.oasis.opendocument.presentation``, ``application/vnd.oasis.opendocument.graphics``

**Images**
   ``image/png``, ``image/jpeg``, ``image/jpg``, ``image/gif``, ``image/bmp``, ``image/tiff``, ``image/svg+xml``, ``image/webp``, ``image/x-icon``, ``image/heic``, ``image/heif``

**Archives**
   ``application/zip``, ``application/gzip``, ``application/x-tar``, ``application/x-7z-compressed``, ``application/x-rar-compressed``, ``application/x-bzip2``, ``application/x-compressed``, ``application/x-zip-compressed``

**Audio and video**
   ``audio/mpeg``, ``audio/wav``, ``audio/x-wav``, ``audio/ogg``, ``video/mp4``, ``video/x-msvideo``, ``video/x-matroska``, ``video/quicktime``, ``video/webm``

**Email and calendar**
   ``message/rfc822``, ``message/delivery-status``, ``text/rfc822-headers``, ``text/calendar``, ``application/eml``, ``application/ics``

**Certificates and signatures**
   ``application/pkcs7-signature``, ``application/x-pkcs7-signature``, ``application/pkcs7-mime``, ``application/pkcs7``, ``application/x-pkcs12``, ``application/pgp-keys``, ``application/pgp-signature``, ``application/x-x509-ca-cert``

**Other**
   ``text/vcard``, ``text/x-vcard``, ``application/xhtml+xml``, ``application/ms-tnef``, ``application/octet-stream``, ``application/x-iwork-pages-sffpages``, ``multipart/related``