Some File Types Are Blocked

There are various reasons why you may see the “This message was blocked because its content presents a potential security issue “mistake in Gmail. Gmail squares messages that may spread infections, similar to messages that incorporate executable records or certain connections

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Why email messages get blocked

Email that have attachments

To secure you against potential viruses and harmful programs (software), Google email doesn’t allow you to attach certain types of data files, including:

  • Various file types (listed below), including their compressed form (like .gz or .bz2 files) or when found within archives folder (like .zip or .tgz files)
  • Documents files with malicious macros
  • Archives file whose listed content is password protected
  • Password protected archives  file whose content is an archive

Note: If you are trying to attach a document that is too large in size, your email message won’t send. Learn more about attachments and file size limits.

See The File types you can’t include as attachments

.ADE, .ADP, .BAT, .CHM, .CMD, .COM, .CPL, .EXE, .HTA, .INS, .ISP, .JAR, .JS (NEW), .JSE, .LIB, .LNK, .MDE, .MSC, .MSI, .MSP, .MST, .NSH .PIF, .SCR, .SCT, .SHB, .SYS, .VB, .VBE, .VBS, .VXD, .WSC, .WSF, .WSH

What you can do?

If you’re sure the file is safe, you can ask the sender to upload the file to Google Drive, and then send it as a Drive attachment.

Emails that don’t have attachments

Sometimes emails are blocked when you don’t include any attachments.

Your email is blocked if it included content, images, or links that might share viruses.

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