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Max Message Size via Exim

Stewart -

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
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