Re: [exim] malfunctioning email delivery after upgrade to Exim 4.96
On 04/09/2022 22:09, Ján Lalinský via Exim-users wrote: ==r...@xyz.com R=xxx (-36): host lookup for did not complete (DNS timeout?) There is no problem with DNS resolution of the relevant domains on those MX servers whatsover, judging by using dig and host command in shell. But judging by the error from Exim, there is. Assuming that this name-resolution should have used DNS, of course. no immediate delivery: more than 10 messages received in one connection That's not an error, only informative. See the main config option smtp_accept_queue_per_connection. We tried settings smtp_accept_max_per_connection = 100 smtp_accept_queue_per_connection = 100 in exim.conf, but to no avail. Then your daemon is not running that configuration. Did you restart it, after that edit? -- Cheers, Jeremy -- ## List details at https://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/
Re: [exim] malfunctioning email delivery after upgrade to Exim 4.96
> == r...@xyz.com R=xxx (-36): host lookup for did not > complete (DNS timeout?) > > There is no problem with DNS resolution of the relevant domains on those > MX servers whatsover, judging by using dig and host command in shell. A dig or host command once is not a proof. #!/bin/sh while true do /usr/bin/time -a -o /tmp/timelog dig +short mx >/dev/null sleep 0.2 done > On IMAP servers receiving emails from the above MX servers, the new and > very frequent error is now this (even when the mid corresponds to just > one recipient): > > no immediate delivery: more than 10 messages received in one > connection You need this setting: > smtp_accept_max_per_connection = 100 for the receiving Exim (you call that "IMAP servers"). And restart Exim. -- ## List details at https://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/
[exim] malfunctioning email delivery after upgrade to Exim 4.96
Hi all, we've just started observing strange malfunctioning of Exim right after upgrade from v4.95 to v4.96 on our centos7 and rockylinux8 servers. Incoming emails are not delivered at once, but instead Exim logs one the following error messages into mainlog and defers the email in exim queue. After some time (minutes, sometimes hours) it delivers the email. On MX servers, we observe the following error extremely frequently for many domains: == r...@xyz.com R=xxx T=remote_smtp_envelope_to_add defer (-54): retry time not reached for any host for 'xyz.com' Sometimes we see also this error: == r...@xyz.com R=xxx (-36): host lookup for did not complete (DNS timeout?) There is no problem with DNS resolution of the relevant domains on those MX servers whatsover, judging by using dig and host command in shell. On IMAP servers receiving emails from the above MX servers, the new and very frequent error is now this (even when the mid corresponds to just one recipient): no immediate delivery: more than 10 messages received in one connection Exim leaves such email in its queue for few minutes and then it eventually delivers it. The only way to speed up exim to its previous standard behaviour is to push the message delivery forward manually via the exim -M command, on both MX and IMAP servers. Is it possible exim 4.96 changed the previous default behaviour and is now sending many more emails in one connection than before? We tried settings smtp_accept_max_per_connection = 100 smtp_accept_queue_per_connection = 100 in exim.conf, but to no avail. Any ideas what may be causing this strange behaviour after upgrade to 4.96? -- S pozdravem Ján Lalinský Webhosting C4 ČESKÝ WEBHOSTING s.r.o. Tel: +420 222 292 444 E-mail: i...@c4.cz http://www.c4.cz -- ## List details at https://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/
