Increasing sending message limit configuration in postal.yml but not working

[testoneasia]

Hello everyone,

I have the problem when my application using my Postal server sending the outbound email with the attachment (3files and total of more than 25MB). But the result was failed.
When I check the log of postal-worker. It had the error of 500 and the message of :
"Got a packet bigger than 'max_allowed_packet' bytes exception_backtrace=/usr/local/bundle/gems/mysql2-0.5.6/lib/mysql2/client.rb:151:in _query'\n/usr/local/bundle/gems/mysql2-0.5.6/lib/mysql2/client.rb:151:in block in query'\n/usr/local/bundle/gems/mysql2-0.5.6/lib/mysql2/client.rb:150:in handle_interrupt'\n/usr/local/bundle/gems/mysql2-0.5.6/lib/mysql2/client.rb:150:in query."

I had tried some configuration in the postal.yml , edit the parameter of " max_message_size: 50" under the part of "smtp_server".
And also modified the "max_allowed_packet" of 75MB in the "/etc/mysql/mariadb.conf.d/50-server.cnf".

Then I restarted the Postal services and the MariaDB services.
However, I got the same result in the end.

May I ask everyone has the experience of increasing the sending limit in Postal here?

[willpower232]

It sounds like you did everything right. How are you running MariaDB? if its with docker, you probably need to use a docker volume to update the config as any other update would be overridden by the container restarting