Hi Guys, Running into maximum message file size error, current settings are: message_size_limit = 30720000 virtual_mailbox_limit = 30720000 Output from postconf | grep message_size_limit root@mail:/var/log# postconf | grep message_size_limit message_size_limit = 30720000 Getting the error message even with 20MB attachments! Any pointers? Thanks
Ok, point well taken. I was sending the message from Outlook and it looks like outlook has its own limit so I tried with ROundcube Message size is 22MB I changed Rundcube default limit of 5MB to 30MB and monitor for errors and I am still getting an error There are no errors posted on /var/log/mail.err I ue telnet to veryfy the server max size Any suggestions on where to look? Thanks for helping Code: nano /var/lib/roundcube/.htaccess php_value upload_max_filesize 30M php_value post_max_size 30M tail -f /var/log/roundcube/errors [22-Sep-2021 13:05:54 +0000]: <btrngb94> SMTP Error: Failed to send data. Message size exceeds server limit in /usr/share/roundcube/program/lib/Roundcube/rcube.php on line 1667 (POST /webmail/?_task=mail&_unlock=loading1632315954497&_lang=undefined&_framed=1&_action=send)
I change Roundcube max attachment size this way: Code: root@posti:/etc/php/7.3/cgi# ls RCS php.ini,v root@posti:/etc/php/7.3/cgi# rcsdiff ./php.ini =================================================================== RCS file: ./RCS/php.ini,v retrieving revision 1.1 diff -r1.1 ./php.ini 689c689 < post_max_size = 8M --- > post_max_size = 11M 841c841 < upload_max_filesize = 2M --- > upload_max_filesize = 10M This is on Debian 10, where default PHP is version 7.3. Change version according to OS used.
Well it turns out it is Postfix causing the error: I set the message_size_limit to 0 in main.cf to see if it clear the issue and it did. Somehow there is about 10MB overhead in messages when Postfix determines the size of the message. Since mine is a private server I kept the message_size_limit = 0 in my configuration. Thanks for your help, one always learn more when pushed to search for the issue given some hints
More likely your 22MB 'message' is really a message with a 22MB file attached, which becomes closer to 30MB when encoded and formatted. You could bump the 30M limit(s) to 35 or 50 and that particular message will probably go through.
