On 10.09.23 21:05, Jesper Hansen via Postfix-users wrote:
My ISP might be filtering port 25, I have no idea.
BUT, I’m NOT connecting to my ISP as the mail log show.
I connect directly to the recipients SMTP and get the right reply.
That’s why I find suspicious that I get a bounce where the ISP is mentioned.
Unless they, considering this is Thailand, is intercepting network traffic if
that is even possible.
I wouldn’t be too surprised.
it is possible and most likely this is happening.
On 10 Sep 2023, at 15:42, postfix--- via Postfix-users
<postfix-users@postfix.org> wrote:
Sep 10 12:21:39 wopr postfix/smtp[25425]: 94E7840E5C:
to=<recipi...@gmail.com>,
relay=gmail-smtp-in.l.google.com[74.125.130.27]:25, delay=0.85,
delays=0.03/0.04/0.56/0.22, dsn=2.0.0, status=sent (250 2.0.0
38A5LeYj001108-38A5LeYl001108 Message accepted for delivery)
google SMTP results have different output format:
Sep 6 14:59:57 fantomas postfix/smtp[8330]: 3F325A03AA: to=<[...]>,
relay=smtp.google.com[142.250.102.26]:25, delay=1.8,
delays=0.2/0.01/0.34/1.2, dsn=2.0.0, status=sent (250 2.0.0 OK 1694005196
q4-20020a170906940400b0099dae56c0e1si8847726ejx.914 - gsmtp)
so, your ISP apparently redirected SMTP traffic to its servers.
Ask your ISP if you can avoid it.
Reporting-MTA: dns; spamfilter-02.totbroadband.com
What’s suspicious here is the "Reporting-MTA: dns;
spamfilter-02.totbroadband.com” line.
Man in the middle? Your ISP filtering port 25 with good intentions?
Try a telnet connection to those host (gmail/mail-tester) on 25 and see who
actually answers.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
One OS to rule them all, One OS to find them,
One OS to bring them all and into darkness bind them
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