Solution to Plesk Onyx The message cannot be received: 552 5.3.4 Error

If you receive the following error when receiving e-mails on your Plesk Onxy server, it indicates that the sent e-mail size is more than the maximum reception limit set by Plesk.

Before making the settings below, keep in mind that the values ​​will now also be valid for emails sent as spam.

First of all, for the solution; We connect to our server via ssh.

ssh [email protected] -p privateport

We check the value considered valid.

postconf | grep message_size_limit

Now we determine the new size we want.

postconf -e message_size_limit=52428800

Finally, we can restart the postfix service with the following command.

service postfix reload