Писать этим пидорам не пытайтесь даже:
Delivery to the following recipient failed permanently:
decr03@mail.ru
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain
mail.ru by
mxs.mail.ru. [94.100.176.20].
The error that the other server returned was:
550 Message was not accepted -- invalid mailbox. Local mailbox
decr03@mail.ru is unavailable: account is disabled