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Attachments can be filtered based on:

  • Whitelist Allow List → Only file types listed are allowed to be uploaded

  • Blacklist Deny List → Only file types listed are blocked from being uploaded

Whitelist

Allow List

Blacklist

Deny List

For example, extensions is configured to: jpg, png

Only the following files will be allowed:

Tip

jpg, jpeg, jpe, jif, jfif, jfi, png

Image Modified

For example, extensions is configured to: exe

Only the following files will be blocked:

Warning

exe, dll, com

Image Modified

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Recommended file types

You can use the following list of extensions:

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  • Images: gif, jpg, png

  • Text files: txt, log, xml

  • Office documents: doc, docx, xls, xlsx, ppt, pptx, pdf

Info

Refer to Which file types are safe for more info.