|Description||This article describes how to Resolve Issues related to emails that are NOT Received / Sent due to Size Limits|
|Scope||All FortiMail versions|
The Default FortiMail Maximum Message Size is 10MB.
1) Max Content Limit.
Detected by Content Profile. Message size (38459KB) exceeds the maximum size (10240KB).
2) Max Session SMTP Limit Options.
message size (38459532 Bytes) exceeds maximum (10485760 Bytes)
552 5.2.3 Message size is over limit (10485760)
These 2 Options Need to be Changed According to the needs.
This can be done by following the Steps Below:
Go to Policy -> Recipient Policy -> < Inbound / Outbound (choose the Preferred Policy) -> Content Profile -> Scan Options -> Maximum size (arrange it According to the needs).
Go to Profile -> Session (choose the Preferred Inbound or Outbound Session Profile) -> SMTP Limits -> Cap message size (KB) at: (arrange it According to the needs).
For incoming / outgoing email, the size limit in the session profile and content profile will be checked.
If in the preferred IP Policy there is no Session Profile or if no IP policy matched, the default size limit of 10 MB will be used.
If in the preferred IP Policy there is no Session Profile or if no IP policy matched, the default size limit of 10 MB will be compared with the size limit of the respective domain specified in the domain settings. FortiMail will use the smaller size.
If a session profile is matched, the FortiMail will use the smaller size between the session profile and the content profile.