On Fri, May 29, 2020 at 01:11:08AM +0200, mauri...@caloro.ch wrote:
> I am not shure if this are normal? In my postfix log this message appair now
> 2 days.
>
> May 29 00:59:22 mail postfix/smtpd[12989]: warning: hostname
> net6-ip74.linkbg.com does not resolve to address 87.246.7.74: Name or
> service not known
The host in question does not exist (NXDOMAIN) in the forward DNS zone
of linkbg.com.
> May 29 00:59:43 mail postfix/smtpd[12781]: warning: hostname
> net6-ip70.linkbg.com does not resolve to address 87.246.7.70: Name or
> service not known
You're getting SMTP connections 87.246.7.70 (et. al.) which claim to be
have names like net6-ip70.linkbg.com:
$ dig +noall +ans +nocl +nottl -x 87.246.7.70
70.7.246.87.in-addr.arpa. CNAME 70.0-255.7.246.87.in-addr.arpa.
70.0-255.7.246.87.in-addr.arpa. PTR net6-ip70.linkbg.com.
However that name is fiction:
$ dig +noall +noedns +comment -t a net6-ip70.linkbg.com.
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 13194
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
> Thanks for any possible Update
Postfix logs the fact that the name is fiction. That's all.
Nothing to worry about.
--
Viktor.
