Remote_host_said:_451_4.7.1_Greylisting_in_action, _please_come_back

popowich

EQ Forum Admin
Staff member
Hello,

Have you received this error message?

Remote_host_said:_451_4.7.1_Greylisting_in_action,_please_come_back

If you found it in your mail logs you should be able to safely ignore it.

Greylisting is an anti-spam mechanism that blocks connections from unknown sources, but accepts the connections if the remote mail server tries again later.

-Raymond
 
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