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Anti-Virus: Details
All email messages with file attachments must clear four levels of inspection before being forwarded. These levels include:
1. Sophos Anti-virus engine
2. Trend Micro Anti-virus engine
3. Filename and Filetype blocking — Specific filenames can be blocked from our network. If our virus engines do not have an updated definition to block a new virus, filename blocking can be used to prevent the virus from reaching customers. Customers can also add and remove filenames to be blocked for their domains.
4. Policy enforcement — Customers can add and remove content types to be blocked for their domains. By default, Sprint can block all files with the Visual Basic (vbs) and executable (exe) content types.
If a virus is detected that cannot be cleaned, the email is bounced back to the sender with a message indicating that the email contains a virus. The infected document is not included in the bounced message to the sender, to avoid reinfecting the sender's system.
If a virus is detected and can be cleaned, the virus is removed from the attachment and the email is sent to the intended recipient. Text is added to the message indicating that the email contained a virus that was removed. The sender of the infected message is also notified that they sent an infected email.
Email Scanning Process
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