By default postfix limits the attachment size to about 10 MB. You can determine the current limit with the following command:
# sudo postconf | grep message_size_limit
message_size_limit = 10240000
To increase the limit add (or change) the following setting in the file /etc/postfix/main.cf:
# 20MB
message_size_limit = 20480000
After restarting the postfix service the new limit will be active:
# sudo service postfix restart
3 responses to “Ubuntu/Debian & Postfix: Increase attachment size limit”
I found that the comment at the end of the line lead to an error when restarting postfix. I just had to ommit the “# 20MB” and it worked fine.
Hi David,
thanks for the comment. You’re right, I fixed the error.
Nice tip!
Thanks