> Now to wait for something to trigger one of those double-bounce messages.
Ugh. Still undeliverable. Well, I actually GET the email. Something 'internal' seems to be undeliverable. Now 'mail for example.com loops back to myself' (not sure what I've done to myself NOW. Grumble.) Apr 19 16:26:43 mail01 postfix/postscreen[26417]: CONNECT from [209.85.161.182]:33241 to [192.0.2.16]:25 Apr 19 16:26:43 mail01 postfix/dnsblog[26464]: addr 209.85.161.182 listed by domain dnsbl.sorbs.net as 127.0.0.6 Apr 19 16:26:44 mail01 postfix/dnsblog[26421]: addr 209.85.161.182 listed by domain list.dnswl.org as 127.0.5.0 Apr 19 16:26:49 mail01 postfix/postscreen[26417]: PASS NEW [209.85.161.182]:33241 Apr 19 16:26:49 mail01 postfix/psint/smtpd[26424]: connect from mail-yw0-f182.google.com[209.85.161.182] Apr 19 16:26:51 mail01 postfix/cleanup[26433]: 3qqLqH35lbz31pW: message-id=<3qqlqh35lbz3...@mail01.example.com> Apr 19 16:26:51 mail01 postfix/qmgr[24664]: 3qqLqH35lbz31pW: from=<dbl-bnc-b-3...@mail01.example.com>, size=257, nrcpt=1 (queue active) Apr 19 16:26:51 mail01 postfix/smtp[26465]: 3qqLqH35lbz31pW: to=<exampl...@example.com>, relay=none, delay=0.02, delays=0.01/0.01/0.01/0, dsn=5.4.6, status=undeliverable (mail for example.com loops back to myself) Apr 19 16:26:51 mail01 postfix/qmgr[24664]: 3qqLqH35lbz31pW: removed I changed the double-bounce, and address-verify sender prefixes double_bounce_sender = dbl-bnc-A- address_verify_sender = dbl-bnc-B- This^ is obviously from the address verification step. Am I right in reading that^ as either 'qmgr' or 'smtp (default)' are trying to address verify, and failing? Jason