limit messages weight
If you send a large attachment to someone,
it may not go through as their incoming attachment size may be smaller.
The “limit message weight” option lets you define a maximum message weight
so that they will be blocked even before uploading them.
The sending of overweight attachments is stopped,
the email gets bounced back immediately to the sender,
with a warning like:
The message you are trying to send exceeds the global size limit of (xxxx bytes) of the server, reduce the size of the message and attempt to send again.