Change maximum attachment size limit not working?

Meffesino

Hello, when a sender is sending a message with 28MB attachment to one of my mailcow mailbox, the sender receives an error message:

552 5.3.4 Error: message file too big

I checked the Docs to attachment size.
I used nano extra.cf and added the line message_size_limit = 240000000 which should be 240MB and which should overwrite permanently the line of main.cf from message_size_limit = 104857600 to the new value.

I restarted postfix with docker-compose restart postfix-mailcow

It is still not working and the same error occurs!

I don’t know why, because even with the default value of 104MB (=104857600bytes) it should be more than enough space to add an attachment with 28MB and include the envelop too.

What do I miss?

Thanks,
Meffesino

Meffesino

It seems like the message was created by the external email server which should send the message to my mailcow server. I will still monitor that, but consider it solved now.

I just tried to send a message from another domain hosted on the same server with the default value (104857600bytes ), but I was not able to send a 80MB message via SoGo. The error: Message too large. But 60MB went through. Don’t know if there is a limitation at SoGo or a message size limit on different domains on same mailcow host… Let me know if you know whats the problem is, because 80MB shouldn’t trigger the 104MB default size limit.

Thanks,
Meffesino