On 02/15/2011 01:31 PM, Ralf Hildebrandt wrote: > * 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 > # host 212.89.81.105 105.81.89.212.in-addr.arpa domain name pointer smtp.academicjobseu.com. # host 212.89.81.106 106.81.89.212.in-addr.arpa domain name pointer smtp.academicjobseu.com.
Cheers.
