* Carlos Williams <carlosw...@gmail.com>: > I am getting a report from someone on my network that they are getting > delivery failures when attempting to send an email from my Postfix > server to the remote mail server. I see the message stuck on my > Postfix servers queue: > > CB87E778055 1337 Mon Nov 30 08:59:15 tprem...@iamghost.com > (connect to a.mx.premore.net[198.186.193.20]: No route to host) > b...@premore.net
Works OK. What does tracroute 198.186.193.20 return? # traceroute 198.186.193.20 traceroute to 198.186.193.20 (198.186.193.20), 30 hops max, 60 byte packets ... snip ... 4 zr-pot1-te0-0-0-3.x-win.dfn.de (188.1.144.30) 5.288 ms 5.290 ms 5.281 ms 5 cr02.frf02.pccwbtn.net (80.81.192.50) 18.030 ms 18.027 ms 18.132 ms 6 carpathia.ge12-1.br02.ash01.pccwbtn.net (63.218.94.166) 109.111 ms 106.313 ms 106.528 ms 7 xe-3-3.e4.iad1.cirn.net (209.222.130.29) 105.968 ms 106.036 ms 106.044 ms 8 66.117.37.180 (66.117.37.180) 101.005 ms 100.773 ms 101.520 ms 9 * * * 10 * * * 11 * * * 12 * * * 13 * * * 14 * * * 15 * * * 16 * * * 17 * * * 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 dns5.docforge.org (198.186.193.20) 4.241 ms 1.685 ms 0.271 ms > I am guessing that this is a problem with the remote mail server > 'a.mx.premore.net' since my server is sending and receiving email just > fine to every other destination. I then decided to do a MX lookup for > this domain "premore.net" & see if there is anything wrong: > > ;; QUESTION SECTION: > ;premore.net. IN MX > > ;; ANSWER SECTION: > premore.net. 3093 IN MX 0 a.mx.premore.net. > > ;; ADDITIONAL SECTION: > a.mx.premore.net. 3093 IN A 198.186.193.20 > > However my mail server wont send to this destination address and I > have no idea why. Can someone tell me how I can better examine this > situation to understand where the fault lies. > > Thank you! -- 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
