"Senders will tend to back off, and retry at increasingly long intervals, until they get a successful connection."
Thanks for the test Adam. I do agree with your Analysis. The interesting thing is I am not seeing this refusal at my end logged. Perhaps it never made it to the maillog and that is how I am missing it. I do see the message to my other server. It came through fine. Did you send them both the same way? Thanks, Job On Fri, Jul 10, 2020, 9:58 AM Adam D. Barratt via mailop <mailop@mailop.org> wrote: > On Fri, 2020-07-10 at 09:22 -0700, Job Cacka via mailop wrote: > > slowmailtest...@ccbox.com > > slowmailtest...@ccbox.com > > > > slowmailtest...@p-r-c.com > > slowmailtest...@p-r-c.com > > From a quick test, at least half of connections get immediately > rejected, which probably isn't helping: > > adam@kotick:$ telnet prcmail.p-r-c.com 25 > Trying 76.14.210.251... > telnet: Unable to connect to remote host: Connection refused > adam@kotick:$ telnet prcmail.p-r-c.com 25 > Trying 76.14.210.251... > telnet: Unable to connect to remote host: Connection refused > adam@kotick:$ telnet prcmail.p-r-c.com 25 > Trying 76.14.210.251... > Connected to prcmail.p-r-c.com. > Escape character is '^]'. > 220 barracuda.ccbox.com ESMTP (f191c7be2ab0eba84da576b7c6e04258) > quit > 221 barracuda.ccbox.com Goodbye adsl.funky-badger.org, closing connection > Connection closed by foreign host. > > Testing using swaks also gave refusals for the first two attempts. > > Senders will tend to back off, and retry at increasingly long > intervals, until they get a successful connection. > > Adam > > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop >
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