On 05/15/2014 06:46 AM, Conrad G T Yoder wrote: > > It is a true bounce - mail is being rejected. The error message is phrased > as a "temporary failure," but the message is bounced at the SMTP transaction. > “At some point,” they stop bouncing. RR won’t say when that happens. > > > <u...@roadrunner.com>: delivery temporarily suspended: host > cdptpa-pub-iedge-vip.email.rr.com[107.14.166.70] refused to talk to me: 421 > 4.7.1 - Connection refused - <66.33.216.56> - Too many concurrent > connections ( <2> ) from source IP
This is a 4xx status, so it is a temp failure, and Mailman should be retrying these. It looks like what is going on is the outgoing MTA has received multiple messages from Mailman for RR recipients, and is trying to send them in parallel. The bottom line is that these messages should be ultimately delivered. Note that if my analysis is correct, it would appear that Mailman is already sending 1 message per recipient to the outgoing MTA because of personalization or VERP enabled or SMTP_MAX_RCPTS = 1, and this is a case where a larger SMTP_MAX_RCPTS and no VERP or personalization might help. Unfortunately, the only one of these things that *might* be available to a list owner is personalization. -- Mark Sapiro <m...@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org https://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-users/archive%40jab.org