Author: Daniel Tiefnig Date: To: exim-users Subject: Re: [exim] Exim has a bad queue handling?
Jörg Sommer wrote: > For Exim on the sender site, is greylisting a problem?
Yes. There is a problem with exims retry mechanism if a remote system is
greylisting based on recipient address, sender address and sender IP. As
exim gets a temporary error for "RCPT TO", it thinks the mailbox is
currently not available. Exim can't know that another e-mail in the
queue with a different sender address could actually get through to the
recipient.
With a moronic greylisting setup (no auto-whitelisting) on the remote
side and a lot of emails this really is a problem. One may choose at
which side the problem is, though.
