>> >> >> Just to know, how exim's sender verification function copes with >> greylisting? I mean, at the first time exim attempts to check some user >> mailbox on a given mx with greylisting functions, it gets a 450 reply code. >> Does exim assumes the sender address is forged in that case? >> Exim sender verification is very flexible. On my setup a temp error would >> not cause a rejection or delay. Failures bypass sender verification. I only >> reject senders where the sender as been afirmatively confirmed as a bad >> email address. >> You mean, a 5xx (permanent) error? >> >> Most sites don't use permanent errors for unknown mailboxes: the >> rfc-suggests error code for this case is a temporary one (but maybe I didn't >> recall it good enough). >> >> giampaolo >> '
Hi, I have recently played with email verification in the context of validating a web form, and I get quite a few 5xx errors. Wolfgang Hamann
