My Exchange Server is somehow not allowing users to send out email greater than 20 MB to external email ?
Internally it works great with no issues.
I've also tried with 18 MB file to my free email account but it is rejected with the following error:
This message wasn't delivered to anyone because it's too large. The limit is 20 MB. This message is 25 MB.
Generating server: PRODHTCAS02-VM.domain.com
mail.domain.com #550 5.3.4 SMTPSEND.OverAdvertisedSize; message size exceeds fixed maximum size ##
FYI: mail.domain.com --> is Symantec Messaging Gateway (Brightmail email appliance running as VM).
Any help would be greatly appreciated.