Good morning, I have e-mail sending and receiving errors, which also happens is that when a person signs up, she does not receive a registration confirmation email. When I send an email I also have problems and get a code.
This message was created automatically by mail delivery software.
The message sent That You Could Not Be delivered to one or more of its
recipients. This is a permanent error. Following the address (es) failed:
SMTP error from remote mail server after MAIL FROM: SIZE = 3552:
550 OR-001 (BAY004-MC6F37)
What does that mean?
There could be an issue with your mail server, try installing Wp mandrill plugin to confirm that it is not a server issue.