Blocked File Types

For security purposes certain file types are restricted from being sent or received by email. You may encounter an error if you attempt to send these file types, or your recipient may not receive the attachment. 

The following file types are blocked by DMU explicitly.

'vbs' or 'sct' or 'scr' or 'reg' or 'pif' or 'pcd' or 'msi' or 'ms' or 'mdb' or 'lnk' or 'jse' or 'isp' or 'ins' or 'inf' or 'hta' or 'hlp' or 'exe' or 'crt' or 'cpl' or 'com' or 'cmd' or 'chm' or 'bat' or 'zip'

Additionally, Microsoft may automatically block certain file types that have a high likelihood of having a malicious payload.

You can find more info on that here.

Attachment File Size Limits

Due to storage and bandwidth limitations, attachment file size in outlook is restricted to 36MB.

If you need to send a file larger than 36MB please contact the service desk and we can assist with the best options for sharing large files.

External Forwarding

Forwarding of email to an external mailbox is not allowed from any DMU mailbox. 

Sending Secure and Confidential Information

Confidential information detection is turned on for all mailboxes. You may receive a warning if you attempt to send unencrypted confidential information. 

• Read how to send an encrypted email here - https://dmu.freshservice.com/support/solutions/articles/14000018417
• Read about our Data classification policies here - https://dmu.policystat.com/policy/13204807/latest/