Ricardo Kleemann writes: > successful deliveries to yahoo and gmail, the relay shows a yahoo > and gmail server respectively: > Oct 23 13:18:07 localhost postfix/smtp[6101]: 0B0B344071: > to=<xxxx...@yahoo.com>, > relay=mta6.am0.yahoodns.net[98.138.112.35]:25, delay=1.4, > delays=0.01/0.19/0.15/1, dsn=2.0.0, status=sent (250 ok dirdel)
That's not a relay in the relevant sense. That host is already Yahoo. Everything past that is just internal details to Yahoo. The same is true of your gmail example. > Bad delivery attempts to same recipients at yahoo and gmail, but > this time it’s relaying through a server in Brazil: > Oct 24 06:27:26 localhost postfix/smtp[11544]: B7064449E0: > to=<xxxx...@yahoo.com>, relay=mx2.ibest.com.br[177.153.23.241]:25, > conn_use=17, delay=501, delays=0.03/501/0.2/0.21, dsn=5.7.1, > status=bounced (host mx2.ibest.com.br[177.153.23.241] said: 554 > 5.7.1 < xxxx...@yahoo.com>: Relay access denied (in reply to RCPT > TO command)) Almost certainly it's just telling you you don't have permission to relay through that host. Is there a reason you think that you should have permission, or did you just assume it would work? Or perhaps you had past experience but no contract, and they decided that being an open relay was a bad idea. > So I don’t understand why would any server be bouncing back with a > relay error. Actually, the question is why any server not operated by the recipient's ISP would allow you to relay. And the answer is simple. Either they are an external MX authorized by the recipient ISP to relay any mail to the recipient, or you have an explicit agreement with them to relay mail from you. There's a third answer, which is that they let anyone relay. Such hosts are called "open relays," they are frequently used by spammers, and they tend to get blacklisted by the major providers and "black hole" lists very quickly. So nobody who has a reputation to protect allows open relay any more (or they learn very quickly that it's a bad idea). Regards, ------------------------------------------------------ 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
