* J4K <ju...@klunky.co.uk>: > > Hi, > > I just watched an IP address fail to be correctly resolved back to > the A record. I could resolve the IP with the the same DNS on the same > server myself. > > These connection from a server is recorded by postfix as unknown for > 212.89.81.105, yet an nslookup on this IP resolves back to the correct > address:- > > Non-authoritative answer: > 105.81.89.212.in-addr.arpa name = smtp.academicjobseu.com. > > > Feb 15 13:06:26 logout postfix/smtpd[111]: warning: 212.89.81.105: > address not listed for hostname smtp.academicjobseu.com > Feb 15 13:06:26 logout postfix/smtpd[111]: connect from > unknown[212.89.81.105] > Feb 15 13:06:29 logout postfix/smtpd[111]: 3E42B81E81: > client=unknown[212.89.81.105] > Feb 15 13:06:34 logout dkim-filter[222]: 3E42B81E81: no signature data > Feb 15 13:06:34 logout postfix/qmgr[111]: 3E42B81E81: > from=<ag...@smtp.academicjobseu.com>, size=nnnn, nrcpt=1 (queue active) > Feb 15 13:06:34 logout postfix/smtpd[111]: disconnect from > unknown[212.89.81.105] > > Is there something that I missed in the postfix configuration?
$ host 212.89.81.105 105.81.89.212.in-addr.arpa domain name pointer smtp.academicjobseu.com. $ host smtp.academicjobseu.com. smtp.academicjobseu.com has address 212.89.81.106 212.89.81.105 != 212.89.81.106 -- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebra...@charite.de | http://www.charite.de
