Miért küldi vissza az e-mailem a gmail? és mit jelent amit visszaküld? Létező e-mailre küldöm és nem haladja meg a max e-mail nagyságát.

Delivery to the following recipient failed permanently:

Technical details of permanent failure:

Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 Mailbox quota exceeded (state 13).