Arch Leaders,
Was there a reverse lookup problem with the mail delivery from
[email protected] earlier today. It looks like reverse lookup for
95.216.189.61 was failing this morning, and the IP got banned by fail2ban in
the postfix jail. One of the log entries was:
2024-11-08T09:24:43.204447-05:00 valkyrie postfix/smtpd[490171]: NOQUEUE:
reject: RCPT from unknown[95.216.189.61]: 450 4.7.25 Client host rejected:
cannot find your hostname, [95.216.189.61]; from=<[email protected]>
I had to unban the IP manually after whatever was going on this morning.
Was there a temporary issue with DNS reverse lookups earlier?. I can look
it up with a reverse lookup now just fine, e.g.
$ dig -x 95.216.189.61
; <<>> DiG 9.20.3 <<>> -x 95.216.189.61
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42701
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 405df5f3dae627dd01000000672e9d65152c46ac67e9ae9e (good)
;; QUESTION SECTION:
;61.189.216.95.in-addr.arpa. IN PTR
;; ANSWER SECTION:
61.189.216.95.in-addr.arpa. 54097 IN PTR mail.archlinux.org.
;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1) (UDP)
;; WHEN: Fri Nov 08 17:23:17 CST 2024
;; MSG SIZE rcvd: 115
Thought I would pass it along in case there was an issue that needed
looking into.
--
David C. Rankin, J.D.,P.E.
