Email attachments

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 with attachments. A reject notice will automatically 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 filters for viruses and spam.