We recently migrated the hosting and email account of a user to another server. We've started receiving this error message when trying to send messages via the Outlook 2013 email client.
Start of Message
Your message did not reach some or all of the intended recipients.
Subject: test Sent: 4/7/2015
The following recipient(s) cannot be reached:
550 5.7.1 some code This message does not comply with required standards.
End of Message # --
Obviously I edited a few stuff there in the message, such as the recipient email, but the error is as is - Code: 550 5.7.1
The POP and SMTP settings of the user still route through the same "mail.domain.tld" address, using the same ports. SMTP Authentication is enabled.
I found this on the microsoft support site: http://ift.tt/1IigZ53
But the discussion doesn't really identify a common workaround. Any ideas?
http://ift.tt/1dvHQ0Z
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