On 2023-04-25 at 12:24:04 UTC-0400 (Tue, 25 Apr 2023 12:24:04 -0400)
Alex via Postfix-users <[email protected]>
is rumored to have said:
Hi, I realize this is probably one of the most frequently asked
questions,
but I really can't figure out why this was rejected.
Apr 25 12:06:01 petra postfix-226/smtpd[592344]: NOQUEUE: reject: RCPT
from
mail.email.eurobank.rs[195.242.76.237]: 450 4.1.8
<[email protected]>:
Sender address rejected: Domain not found; from=<
[email protected]> to=<[email protected]> proto=ESMTP
helo=<
mail.email.eurobank-direktna.rs>
What am I missing? eurobank-direktna.rs and
mail.email.eurobank-direktna.rs
both have forward and reverse DNS entries.
I thought maybe it just didn't resolve properly at the time the email
was
received, but it's been happening for hours.
The 450 error code implies a transient failure, e.g. a SERVFAIL reply or
a timeout. One of the authoritative nameservers for eurobank-direktna.rs
(the domain part of the sender address) times out for me at the moment,
which may be related to what you're seeing.
--
Bill Cole
[email protected] or [email protected]
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
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