Hi, Ray... The problem is that the "failing" message isn't being sent to <[EMAIL PROTECTED]>, but to <'[EMAIL PROTECTED]'>.
So the host that's being looked up is not "design-electric.com", but "design-electric.com'". If you do a nslookup on anything ending with ".com'", it will fail... It's a user error. Malc. > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On > Behalf Of Ray Collazo > Sent: Friday, September 12, 2008 10:56 AM > To: [email protected] > Subject: Re: [courier-users] Courier will not deliver to a > Cloaked MTA? > > On Thu, Sep 11, 2008 at 7:38 PM, Ray Collazo > <[EMAIL PROTECTED]> > wrote: > > > Hello all! > > > I have found that my installation of Courier will not > deliver mail > > > to MTAs that cannot be Pinged by normal means. > > > > I highly doubt it. > > Show examples, log files, SMTP excerpts, etc. > > > > jerry > > > Jerry, Thanks for responding! > > > Take for example this failed message, as shown in the log > (One of many entries for this email address): (log entries > trimmed for brevty, but all show the same behaviour as > below:) ========= Sep 11 14:08:22 sentinel courierd: > started,id=000BB4A9.48C5A438.00004BB7,from=<[EMAIL PROTECTED] > om>,module=esm > tp,host=design-electric.com',addr=<'[EMAIL PROTECTED]'> > Sep 11 14:09:22 sentinel courieresmtp: > id=000BB4A9.48C5A438.00004BB7,from=<[EMAIL PROTECTED]>,addr > =<'[EMAIL PROTECTED] > ign-electric.com'>: Connection timed out Sep 11 14:09:22 > sentinel courieresmtp: > id=000BB4A9.48C5A438.00004BB7,from=<[EMAIL PROTECTED]>,addr > =<'[EMAIL PROTECTED] > ign-electric.com'>,status: deferred > Sep 11 16:09:22 sentinel courierd: > started,id=000BB4A9.48C5A438.00004BB7,from=<[EMAIL PROTECTED] > om>,module=esm > tp,host=design-electric.com',addr=<'[EMAIL PROTECTED]'> > Sep 11 16:10:22 sentinel courieresmtp: > id=000BB4A9.48C5A438.00004BB7,from=<[EMAIL PROTECTED]>,addr > =<'[EMAIL PROTECTED] > ign-electric.com'>: Connection timed out Sep 11 16:10:22 > sentinel courieresmtp: > id=000BB4A9.48C5A438.00004BB7,from=<[EMAIL PROTECTED]>,addr > =<'[EMAIL PROTECTED] > ign-electric.com'>,status: deferred > ========= > This message had been in the queue since Monday Sept 8th, and > as we have our delivery timeout set to 3 days, the message > expired today. > > > Of course the user has received a failure message just > shortly after the above final log entry: ========= > -------------------------------------------------------------- > ------------- > > UNDELIVERABLE MAIL > > Your message to the following recipients cannot be delivered: > > <'[EMAIL PROTECTED]'>: > <<< Connection timed out > > -------------------------------------------------------------- > ------------- > ========= > > > I immediately did an NSLOOKUP and check the mail exchange info... > ========= > [EMAIL PROTECTED]:~$ nslookup > > set type=MX > > design-electric.com > Server: 192.168.0.100 > Address: 192.168.0.100#53 > > Non-authoritative answer: > design-electric.com mail exchanger = 10 > keystone.design-electric.com. > > Authoritative answers can be found from: > com nameserver = F.GTLD-SERVERS.NET. > com nameserver = G.GTLD-SERVERS.NET. > com nameserver = H.GTLD-SERVERS.NET. > com nameserver = I.GTLD-SERVERS.NET. > com nameserver = J.GTLD-SERVERS.NET. > com nameserver = K.GTLD-SERVERS.NET. > com nameserver = L.GTLD-SERVERS.NET. > com nameserver = M.GTLD-SERVERS.NET. > com nameserver = A.GTLD-SERVERS.NET. > com nameserver = B.GTLD-SERVERS.NET. > com nameserver = C.GTLD-SERVERS.NET. > com nameserver = D.GTLD-SERVERS.NET. > com nameserver = E.GTLD-SERVERS.NET. > ========= > > I attempt to ping the MX machine: No answer... > ========= > ping keystone.design-electric.com > PING keystone.design-electric.com (64.62.95.66) 56(84) bytes of data. > > --- keystone.design-electric.com ping statistics --- > 13 packets transmitted, 0 received, 100% packet loss, time > 12043ms ========= > > > I try A Second time from a different machine: > ========= > C:\Documents and Settings\Ray>ping keystone.design-electric.com > > Pinging keystone.design-electric.com [64.62.95.66] with 32 > bytes of data: > > Request timed out. > Request timed out. > Request timed out. > Request timed out. > > Ping statistics for 64.62.95.66: > Packets: Sent = 4, Received = 0, Lost = 4 (100% loss), ========= > > > I finally telnet blindly to the SMTP port of the above machine: > ========= > C:\Documents and Settings\Ray>telnet keystone.design-electric.com 25 > > 220 design-electric.com Microsoft ESMTP MAIL Service, > Version: 6.0.3790.3959 ready at Thu, 11 Sep 2008 19:24:21 > -0600 ========= > > > Sure enough, I can connect manually. > > > To verify that I am not having any network difficulties, I > have contacted a co-worker and I had him do a ping and a > telnet on his home network connection, which is on a > completely different carrier than the office network > connection: He was able to reproduce my exact same results > (no ping, but can connect to the SMTP server). > > > This very same behavior has happened with a few other email > addresses that this user has attempted to contact, all of > them having unpingable SMTP servers. > > > All other mail goes through the system flawlessly, except to > these few hidden MTAs that this user is dealing with. > > > ... > > > > Here is the extremely odd thing that I Really cannot figure > out now and that makes me go Huh? > > In doing this whole testing, I decided "Ok: Let me try > sending to an address I know should always be there... Postmaster." > > So I went ahead and wrote a test message over to > [EMAIL PROTECTED], and followed the results in the log: > > ======== > [EMAIL PROTECTED]:~$ sudo grep [EMAIL PROTECTED] > /var/log/mail.log Sep 11 18:54:18 sentinel courierd: > started,id=000BB358.48C9CBCA.0000051F,from=<[EMAIL PROTECTED] > ing.com>,modul > e=esmtp,host=design-electric.com,addr=<[EMAIL PROTECTED]> > Sep 11 18:54:19 sentinel courieresmtp: > id=000BB358.48C9CBCA.0000051F,from=<[EMAIL PROTECTED]> > ,addr=<postmas > [EMAIL PROTECTED]>: 250 2.6.0 > <[EMAIL PROTECTED]> > Queued mail for delivery Sep 11 18:54:19 sentinel courieresmtp: > id=000BB358.48C9CBCA.0000051F,from=<[EMAIL PROTECTED]> > ,addr=<postmas > [EMAIL PROTECTED]>,size=3884,success: delivered: > keystone.design-electric.com [64.62.95.66] Sep 11 18:54:19 sentinel > courieresmtp: > id=000BB358.48C9CBCA.0000051F,from=<[EMAIL PROTECTED]> > ,addr=<postmas > [EMAIL PROTECTED]>,size=3884,status: success ======== > Apparently the message to Postmaster went through!!! > > > So what the heck is causing my users message to hang in the > queue for so many days and then give up?? I checked to verify > that the user that is being addressed exists (or at least > isn't being immediately rejected) by manually initiating a > mail exchange: > ======== > [EMAIL PROTECTED]:~$ telnet keystone.design-electric.com 25 > Trying 64.62.95.66... > Connected to keystone.design-electric.com. > Escape character is '^]'. > 220 design-electric.com Microsoft ESMTP MAIL Service, > Version: 6.0.3790.3959 ready at Thu, 11 Sep 2008 20:02:56 > -0600 EHLO mail2.loraninc.com 250-design-electric.com Hello > [216.117.220.102] 250-TURN 250-SIZE 10485760 250-ETRN > 250-PIPELINING 250-DSN 250-ENHANCEDSTATUSCODES 250-8bitmime > 250-BINARYMIME 250-CHUNKING 250-VRFY 250-X-EXPS GSSAPI NTLM > LOGIN 250-X-EXPS=LOGIN 250-AUTH GSSAPI NTLM LOGIN > 250-AUTH=LOGIN 250-X-LINK2STATE 250-XEXCH50 250 OK MAIL FROM: > [EMAIL PROTECTED] 250 2.1.0 > [EMAIL PROTECTED] OK RCPT TO: > [EMAIL PROTECTED] 250 2.1.5 [EMAIL PROTECTED] QUIT > 221 2.0.0 design-electric.com Service closing transmission > channel Connection closed by foreign host. > ======== > > > Any troubleshooting tips would be Really appreciated at this > time, as Now I'm Really confused. > > -Ray > > > -------------------------------------------------------------- > ----------- > This SF.Net email is sponsored by the Moblin Your Move > Developer's challenge Build the coolest Linux based > applications with Moblin SDK & win great prizes Grand prize > is a trip for two to an Open Source event anywhere in the > world http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > courier-users mailing list > [email protected] > Unsubscribe: > https://lists.sourceforge.net/lists/listinfo/courier-users > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ courier-users mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
