What do the most common email error codes mean?

530 – Incorrect password or username.
– Make sure you have entered your full email address as the username, e.g., postkast@domeen.ee.

550 – Recipient does not exist.
– Ensure the recipient’s email address is correctly written.

551 – Relay access denied
– If you are sending emails through our server (mail.beehosting.pro), make sure that authentication is enabled for outgoing mail.

552 – Sent message exceeds allowed size.
– The maximum message size via mail.beehosting.pro is 20 MB. For sending large files, we recommend using FTP.