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Email Security - Executable Attachments
As we transition to our new enhanced email security system, there will be a change in behavior when the scanning engine encounters an executable attachment.
Our previous scanning system also took action on a defined list of file extensions. That system would rename executable files and add warning text to the body of the message. In most cases the file was delivered but would need to be renamed in order to execute the file. It would not be delivered if it matched known virus or malware signatures.
If an email sent to your account includes an attachment with one of the file extensions listed below, the attachment will be removed before the email is delivered and the following will be prefixed to the subject of the email - [Attachment Removed]. This is consistent with Microsoft behavior, which also Blocks Attachments in Outlook.
This also applies to archives attached to emails (typically .zip or .tar files). If an archive contains a file with an extension listed below, the archive will be removed before the email is delivered.
Important: We are unable to recover files removed by the gateway. You will need to work with the sender to use an alternative method for sharing these types of files. Use the workarounds listed below if you need to receive a file.
How can I receive (or share) files?
Using email as a file sharing workflow is not the best or most secure tool. Once the transition to the new email security system is complete, please use one of the following options:
- Use a collaboration tool (recommended).
- Ask the sender to rename the file before sending. Once you receive the file attachment within your email, you can save it to your computer and restore the original file extension.
List of files extensions removed by new email security system