Arch Leaders, Was there a reverse lookup problem with the mail delivery from gitlab@archlinux.org 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=<gitlab@archlinux.org> 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.