Hello,

I'm seeking a workaround for Microsoft's litany of IPs landing on DNSBL. They'd like all mail irrespective of DNSBL status to be delivered, which requires a skip if the sender IP is blacklisted in postscreen. With separation between postscreen and smtpd, postscreen rejects the connection before handing off to smtpd so smtpd_recipient_restrictions isn't triggered.

Is there an appropriate workaround that allows postscreen to report DUNNO after DNSBL checks if the recipient matches in a table?

Sample line:

Mar 15 13:51:22 atlas postfix/postscreen[5978]: NOQUEUE: reject: RCPT from [1.2.3.4]:51944: 550 5.7.1 Service unavailable; client [1.2.3.4] blocked using zen.spamhaus.org; from=<x@y>, to=<a@b>, proto=ESMTP, helo=<aspmx3.googlemail.com>

Postscreen config:

postscreen_dnsbl_action=enforce
postscreen_dnsbl_sites=bl.spamcop.net*2 b.barracudacentral.org*2 zen.spamhaus.org=127.0.[0;1;2].[0..254]*2 list.dnswl.org*-2


- Matt
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