Email problem: What does this error mean?
When I send email to one email address, I get this error:
This 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:
dngvi@domain.co.kr
SMTP error from remote mail server after MAIL FROM:<test@melcosacn.com>:
host mail.domain.co.kr [206.xxx.22.30]:
553 [Sniper] <test@melcosacn.com> is on the list of sf-blacklist.
What does this error mean? How to fix this?
Many thanks.
