Mail delivery failed
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salve a tutti
mi stanno arrivando un sacco di queste mail.
qualcuno mi sa spiegare di cosa si tratta?
salutiMail delivery failed: returning message to sender
Mail Delivery System (Mailer-Daemon@hostingweb2.netsons.net)
08:29
A informatikmania@libero.itThis message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:td_viktoria@mail.ru
host mxs.mail.ru [94.100.180.104]
SMTP error from remote mail server after end of data:
550 5.7.1 This message was not accepted due to domain (libero.it) owner DMARC policy (RFC 7489) https://help.mail.ru/mail-help/postmaster/dmarc
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