PROBLEM
I want to limit the max message size.

ENVIRONMENT

• On-Premise Server + WebMail Installations: Version 6.0 > Current Version

CAUSE
The default message size limit is 50MB under Exim to prevent DOS attacks

RESOLUTION

1. You can specify the max message size for incoming/outgoing messages by editing the Exim configure file:
   

   /usr/local/atmail/mailserver/configure

2. Define the field:
   

   message_size_limit = 10M

3. Replace 10M with the size in MB you want to accept incoming/outgoing messages.
4. Save change and restart Atmail for changes to take affect.
   

   % /etc/init.d/atmailserver restart