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==Email security and attachments==
XMission rejects email attachments with commonly malicious file formats as a security measure to prevent potential viruses from impacting customers. Rejecting emails with executable files, for example file.exe, will protect you from possibly receiving malicious software containing a virus or malware. 

This blocking is applied to all inbound and outbound email. Automatically, a reject notice will be sent to any sender attempting to send to, or from, the XMission mail system.


==Blocked file types== 

Rejected files end in: '''scr, vbs, dll, exe, shs, bat, lnk, pif, chm, hta, com, cmd'''


==Maximum attachment sizes==

XMission allows email attachments with the following sizes:

* Up to 10 MB for @xmission.com accounts via https://webmail.xmission.com
* Up to 25 MB for @xmission.com email sent with mail applications
* Up to 50 MB for our hosted Zimbra email 


==Learn more==

Learn how XMission [http://transmission.xmission.com/2013/08/14/how-xmission-spam-and-virus-filtering-works filters for viruses and spam].