It took a week to figure out because I had some PHP problems to solve
first, but when I finally got down to it, the problems were these:
• The certificates in main.cf were incorrectly specified. On the old
system, I was using the standard snakeoil certificates. Maybe I should
use the ones that I bought for my server instead? This change may not
have affected anything.
• I didn't have TLS support enabled. Those pesky "#" symbols!
• I enabled DKIM for outbound email on the server provider's site. I
didn't have that before, but I know it's better to have it than not.
• The most important thing I didn't know until after I fixed all of the
above. My zone file on my server's provider didn't have the IPv6 reverse
DNS record in it! I added that, and mail started flowing. What I thought
was odd was that old messages had been flushed from the queue. I
expected to get a lot of test messages, but they were all removed.
Mail is now flowing nicely as it should when program streams complete.
On 9/30/2024 12:00 AM, Peter via Postfix-users wrote:
On 30/09/24 10:38, Steve Matzura via Postfix-users wrote:
2024-09-29T21:31:27.402601+00:00 tgv24 postfix/error[1775]:
B9E5510584F: to=<tgvpad...@theglobalvoice.info>, orig_to=<tgvpadmin>,
relay=none, delay=48744, delays=48594/150/0/0.01, dsn=4.4.1,
status=deferred (delivery temporarily suspended: connect to
fb.mail.gandi.net[217.70.178.216]:25: Connection timed out)
2024-09-29T21:31:27.403862+00:00 tgv24 postfix/smtp[1744]: connect to
fb.mail.gandi.net[217.70.178.217]:25: Connection timed out
2024-09-29T21:31:27.407038+00:00 tgv24 postfix/error[1774]:
B46BD105849: to=<tgvpad...@theglobalvoice.info>, orig_to=<tgvpadmin>,
relay=none, delay=84686, delays=84535/150/0/0.01, dsn=4.4.1,
status=deferred (delivery temporarily suspended: connect to
fb.mail.gandi.net[217.70.178.216]:25: Connection timed out)
2024-09-29T21:31:27.410377+00:00 tgv24 postfix/error[1775]:
C72C0105866: to=<tgvpad...@theglobalvoice.info>, orig_to=<tgvpadmin>,
relay=none, delay=27148, delays=26998/150/0/0.01, dsn=4.4.1,
status=deferred (delivery temporarily suspended: connect to
fb.mail.gandi.net[217.70.178.216]:25: Connection timed out)
This log entry repeats ad infinitum.
This looks like a port 25 block to me. Check with your host to make
sure they are not blocking outbound port 25, many of them require a
request to open the port.
Peter
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