Postfix mail attachment size

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The Postfix default attachment size is 10MB i.e. 10240000 bytes.

This command will output the currently set attachment size limit:

postconf | grep message_size_limit

To increase the limit to 50 MB, run this command:

postconf -e message_size_limit=52428800

from: https://rtcamp.com/tutorials/mail/postfix-attachment-size/

also: https://www.howtoforge.com/community/threads/increasing-email-size-limit-from-10mb.33960/

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