-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Am 11.06.2015 um 14:23 schrieb Viktor Dukhovni:
> There was a problem looking up the addresses of the above hosts, > perhaps a nameserver was down, or a network connectivity problem > prevented access. > I thought about that too but after my tests it seems to be very unlikely for me :-) I just sent a testmail to the user at the orgj.ch domain and instantly received the same error from postfix. Jun 11 14:50:35 smtp1 postfix/smtp[29194]: warning: no MX host for ogrj.ch has a valid address record Jun 11 14:50:35 smtp1 postfix/smtp[29194]: DA85418006C: to=<remo...@ogrj.ch>, relay=none, delay=0.08, delays=0.06/0.01/0/0, dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=smta3.abxsec.com type=A: Host not found) I checked the dns on the server that issued the error and had no problems in resolving the MX hosts and get a A record for the MX with prio 10 # mx records ;; ANSWER SECTION: ogrj.ch. 3447 IN MX 120 smtp1.seabix.com. ogrj.ch. 3447 IN MX 130 smta4.abxsec.com. ogrj.ch. 3447 IN MX 140 smta3.abxsec.com. ogrj.ch. 3447 IN MX 510 mtas.abxsec.com. ogrj.ch. 3447 IN MX 520 mtaz.abxsec.com. ogrj.ch. 3447 IN MX 10 smtasg01.abxsec.com. ogrj.ch. 3447 IN MX 20 smtazh01.abxsec.com. ogrj.ch. 3447 IN MX 110 smta2.abxsec.com. # A record for MX with prio 10 ;; ANSWER SECTION: smtasg01.abxsec.com. 768 IN A 193.246.80.88 # finally test a connection telnet smtasg01.abxsec.com 25 Trying 193.246.80.88... Connected to smtasg01.abxsec.com. Escape character is '^]'. 220 smtasg01.abxsec.com ESMTP Thu, 11 Jun 2015 14:51:01 +0200 QUIT 221 2.0.0 smtasg01.abxsec.com closing connection Connection closed by foreign host. So connections to the mx host with prio 10 seems to be working, just one or two seconds after postfix showed the error. I really tested a lot of queries manually and NEVER had problems with resolving. Therefore I wonder why postfix "sees" a problem with EVERY mail for the domain ogrj.ch Thanks tobi -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJVeYmQAAoJEDUc5iWoaKTksJIP/irTXg2pRLImE5uSGF1N4Qff JDOdIaLo8AMDT/HEPmTCjO4+q01F3A2EOULTXOq7xHkwQXbM8yiot4RYfFQh6HSr TYZrY6mFkzEpWs4564GBfHcqaX+IFZeb6MZ8ZlXKjBmUxCbQ8/KcCK3dReSqTv2R 62sQwJXgN/CPKHXg96zj8o2yeQSjfsP4WR8f9Kjh2+YOW4gTVN9OxUCNjiV8Icgr Cnw+eAFJSl2SMmv9ioKB2VoCk3P3S17EXOuzvSMRW24UEYDbN8kTwPGrcIEHlyLi 5Aj6pFD/eIeqkm+ZeaZYxybTtde3Zgkfv/nx1IzK0SzyeEostQnKuy2jFbkeW/QN OisxKr84nRgm8+rK21J/WeKCGO5K8TpGnjFUXII+9RO2f30L/P/I8KduXfI27aFZ 867/kDXcm5kBmitJNU0Phi4BKjM6mWXk2/ePsEgr5DGT72rA19GL6NIeW+a3T+Bh CWpH/e/7+qrZgKQ5qFj5wwXtA/2VxVpSlmakXVHHowYRXWrB/69pqG/MmuzI+/bc 7Hpn2eK7YhvjRTjIN3w/sxkp4hXW07PLpZLuLNr8Wram+IRywtGnybJQmVB2cGe2 aqOqGVqxqsBYYcTEOFtp6p1ivGvw4lQs1xJr/16WEmQwtNp2NCGK8IQxJhz9MUTR h2jgALW2Dd0pqItxjkiy =odEb -----END PGP SIGNATURE-----
