On Sun, Sep 22, 2024 at 10:28:14AM -0500, Greg Sims via Postfix-users wrote:
> We receive over 500 log entries per day from Comcast that look like this: > > Sep 18 03:05:07 mail0 r105/smtp[15929]: AE3378857BA: to=<some...@comcast.net>, > relay=mx1.comcast.net[96.114.157.80]:25, delay=0.69, > delays=0/0.01/0.6/0.08, dsn=4.1.0, status=deferred (host > mx1.comcast.net[96.114.157.80] > said: 421 4.1.0 75.126.209.105 Throttled - try again later. Please see > http://postmaster.comcast.net/smtp-error-codes.php#RL000001 (in reply to > MAIL FROM command)) I'd start with an appropriate PTR record for your IP address, the below looks much too "generic": 105.209.126.75.in-addr.arpa. PTR 69.d1.7e4b.ip4.static.sl-reverse.com. > The postmaster url says (among other things): > > If the rate-limit is impacting your ability to deliver email, shortening > your server's delivery retry interval may resolve the issue. If you're sending legit traffic that comcast users definitely want, write to the comcast postmaster team for help. They're the best ones to resolve the problem. Nobody here knows the details of their their policies, or the nature of your traffic. -- Viktor. _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
