Hi, first time posting -- please be gentle. I was asked to look at a customer's machine, and found that it was not delivering to Yahoo. Over 10,000 messages in queue. The machine is used to, (among other things), send out to an opt-in mailing list.
Apparently Yahoo is "aggressively" greylisting this host. This looks much the same as reported by Catalin Constantin in April, to which a resolution was not posted. (Thread: http://www.exim.org/lurker/thread/20090420.130417.b1f8d218.en.html#20090420.130417.b1f8d218) None of the remediation efforts seem to work well at draining the queue, except for one. /usr/sbin/exim -bd -q5m The current retry section reads: begin retry yahoo.com rcpt_421 F,7d,1s yahoo.com rcpt_451 F,7d,1s yahoo.com mail_421 F,7d,1s yahoo.com mail_451 F,7d,1s yahoo.com data_421 F,7d,1s yahoo.com data_451 F,7d,1s f.mx.mail.yahoo.com rcpt_421 F,7d,1s f.mx.mail.yahoo.com rcpt_451 F,7d,1s f.mx.mail.yahoo.com mail_421 F,7d,1s f.mx.mail.yahoo.com mail_451 F,7d,1s f.mx.mail.yahoo.com data_421 F,7d,1s f.mx.mail.yahoo.com data_451 F,7d,1s * * F,2h,15m; G,16h,1h,1.5; F,6d,8h # End of Exim 4 configuration What happens is that each queue run gets a 421 Message temporarily deferred - 4.16.51. Please refer to http://help.yahoo.com/help/us/mail/defer/defer-06.html and there after all messages report with: [email protected] R=lookuphost T=remote_smtp defer (-53): retry time not reached for any host for the rest of the queue run. In other words, my attempt to reset the host timeout is ineffective. * * * What does work, after a fashion, is a forced queue run from the crontab: 46 */6 * * * /usr/sbin/exim -oB5 -Rff @yahoo.com eventually all messages get their first 421 temporarily deferred, and then the next attempt for the same message ID delivers it, unless yahoo returns: 421 4.7.0 [TS01] Messages from 75.125.183.146 temporarily deferred due to user complaints - 4.16.55.1; see http://postmaster.yahoo.com/421-ts01.html * * * Is there a way to ignore the hints database for "yahoo.com"? Is there anything else that will allow the remote host's greylisting to work as intended? -- Mardy -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
