Exchange Server Forums

Mail in Queue

Users viewing this topic: none

Logged in as: Guest

Printable Version

All Forums >> [Microsoft Exchange 2003] >> Message Routing >> Mail in Queue

Page: [1] 2 next > >>

Message

<< Older Topic Newer Topic >>

Mail in Queue - 16.Jan.2008 9:01:15 AM

Scouser

Posts: 201
Joined: 5.Aug.2006
Status: offline

Hi. I have a problem regards email sitting in exchange queues when messages are sent via application running on a Linux Server?

To test I logged into the application and sent an email to both an internal and external address. The internal email arrived OK. The external mail sits in the queue:
hotmail.com

(also a number of emails sit in aol.com but thats another issue!)

Back to point. The application also required me to enable the Default POP3 Virtual Server.

With this limited information can anyone assist?
Regards,
Phil.

PS: I have disabled AV software from scanning the SMTP

Post #: 1

Featured Links*

RE: Mail in Queue - 16.Jan.2008 9:08:23 AM

Confused2

Posts: 66
Joined: 16.Nov.2007
From: Scotland
Status: offline

Whats the application actually doing?

Have you made any changes to your Connectors or Default SMTP Service?

(in reply to Scouser)

Post #: 2

RE: Mail in Queue - 16.Jan.2008 9:14:07 AM

Scouser

Posts: 201
Joined: 5.Aug.2006
Status: offline

The application 'FogBugz' is used to monitor software revisions. Nothing has changed regards the SMTP server?

Phil.

(in reply to Confused2)

Post #: 3

RE: Mail in Queue - 16.Jan.2008 9:19:44 AM

Confused2

Posts: 66
Joined: 16.Nov.2007
From: Scotland
Status: offline

You say that messages are sent via the application. How have you implemented this?

(in reply to Scouser)

Post #: 4

RE: Mail in Queue - 16.Jan.2008 9:28:13 AM

Scouser

Posts: 201
Joined: 5.Aug.2006
Status: offline

Entry within dns (alias c name) mail (points to exchange server). Linux server references this.
Phil.

(in reply to Scouser)

Post #: 5

RE: Mail in Queue - 16.Jan.2008 9:46:30 AM

Confused2

Posts: 66
Joined: 16.Nov.2007
From: Scotland
Status: offline

Is this affecting all outbound external mail then?

I would suspect that the DNS change has had a knock on effect somewhere, as you say SMTP or routing has not been changed, and that the POP3 connector is perhaps a bit of a red herring.

(in reply to Scouser)

Post #: 6

RE: Mail in Queue - 16.Jan.2008 11:15:45 AM

Scouser

Posts: 201
Joined: 5.Aug.2006
Status: offline

No just the emails sent from the application.
Have managed to send one out...................then others sit there?

Will keep testing.
Phil.

(in reply to Confused2)

Post #: 7

RE: Mail in Queue - 16.Jan.2008 11:24:28 AM

Confused2

Posts: 66
Joined: 16.Nov.2007
From: Scotland
Status: offline

Ah get you now...

Do you get any NDRs or Error messages? Also, is the address its sending from a valid address in your domain? Could be a Relay Setting or Authentication problem relating to that one machine.

(in reply to Scouser)

Post #: 8

RE: Mail in Queue - 17.Jan.2008 4:03:54 AM

MTK

Posts: 84
Joined: 6.Oct.2005
Status: offline

Did u configure ur external DNS address under Default SMTP Virtual Svr--> right click "properties" --> advanced --> configure?

(in reply to Confused2)

Post #: 9

RE: Mail in Queue - 17.Jan.2008 6:43:47 AM

Scouser

Posts: 201
Joined: 5.Aug.2006
Status: offline

quote:

Did u configure ur external DNS address under Default SMTP Virtual Svr--> right click "properties

SMTP Virtual Server sends out via smart host: cluser3out.eu.messagelabs.com

Nothing configured for DNS (never have in the past)?

Have tested further. SMTP logging: Receive 354+go+ahead 0 0 12 0 94 SMTP form message labs followed by: 451+timeout+(#4.4.2) 0 0 20 0 240219 SMTP

They can not advise further.

Have tried sending test messages to hotmail.com. ESM Message Tracking stops at the following: SMTP: Message routed and queued for remote delivery

I can telnet to hotmail.com (65.54.244.72).

nslook resolves to ip

Any ideas?
Many Thanks,
Phil

PS: Exchange sits on Windows 2003 Server R2 SP2 (fully patched). Exchange 2003 Enterprise SP2

(in reply to MTK)

Post #: 10

RE: Mail in Queue - 17.Jan.2008 7:14:30 AM

Confused2

Posts: 66
Joined: 16.Nov.2007
From: Scotland
Status: offline

Any MSExchangeTransport Errors in your Event Viewer?

(in reply to Scouser)

Post #: 11

RE: Mail in Queue - 17.Jan.2008 7:24:31 AM

Scouser

Posts: 201
Joined: 5.Aug.2006
Status: offline

I have just configured logging I will post back.

I created a Connector. Email disappeared from the queue (delivered). I then attempted to send new mail. Just sat in the queue!! Removed new connector email disappeared from the queue!!
Phil.

(in reply to Scouser)

Post #: 12

RE: Mail in Queue - 17.Jan.2008 7:36:04 AM

Scouser

Posts: 201
Joined: 5.Aug.2006
Status: offline

Log Entry: MSExchangeTransport

Message delivery to the host '194.106.220.35' failed while delivering to the remote domain 'lee-dickens.co.uk' for the following reason: The connection was dropped by the remote host.

Of any use?
Thanks,
Phil.

(in reply to Scouser)

Post #: 13

RE: Mail in Queue - 17.Jan.2008 8:02:24 AM

Confused2

Posts: 66
Joined: 16.Nov.2007
From: Scotland
Status: offline

Just to confirm the following...

Mail sent internally from Exchange = fine
Mail sent externally from Exchange = fine
Mail sent to you from external source = fine
Mail sent internally from Linux via Exchange = fine
Mail sent externally from Linux via Exchange = problem

(in reply to Scouser)

Post #: 14

RE: Mail in Queue - 17.Jan.2008 8:14:45 AM

Scouser

Posts: 201
Joined: 5.Aug.2006
Status: offline

I would say mail sent to domains:
hotmail.com
aol.com
lee-dickens.co.uk

from exchange problem
from linux via exchange problem

Came across this article, not sure if it is related:

http://www.dylanbeattie.net/docs/iis6_bare_linefeed.html

Phil.

(in reply to Confused2)

Post #: 15

RE: Mail in Queue - 17.Jan.2008 8:38:10 AM

Confused2

Posts: 66
Joined: 16.Nov.2007
From: Scotland
Status: offline

Looks like a descent article.

Also found this on Hotmail errors... AOL errors don't surprise me - bind of my life!

http://postmaster.msn.com/Troubleshooting.aspx

http://postmaster.msn.com/Default.aspx

(in reply to Scouser)

Post #: 16

RE: Mail in Queue - 17.Jan.2008 8:47:45 AM

Scouser

Posts: 201
Joined: 5.Aug.2006
Status: offline

I am still testing.......nightmare, work stacking up!!
Phil.

(in reply to Scouser)

Post #: 17

RE: Mail in Queue - 17.Jan.2008 10:29:23 PM

MTK

Posts: 84
Joined: 6.Oct.2005
Status: offline

I had same problem before when I firstly install exchange svr 2003 and problem is solved after I configured external DNS address.

MTK

(in reply to Scouser)

Post #: 18

RE: Mail in Queue - 18.Jan.2008 5:34:55 AM

Scouser

Posts: 201
Joined: 5.Aug.2006
Status: offline

External DNS made no difference.

I added a new connector (no smart host, using DNS) with address space for the 3 domains mentioned. This appeared to have worked but not any longer!! Email to hotmail flys out via the connector the others remain in thre queue.

SMTP records Response:451 timeout (#4.4.2).
Phil.

(in reply to MTK)

Post #: 19

RE: Mail in Queue - 19.Jan.2008 6:38:49 AM

Scouser

Posts: 201
Joined: 5.Aug.2006
Status: offline

Still scratching my head on this one guys?

Exchange SMTP Virtual Server queue records:
"The connection was dropped by the remote host."

Read somewhere regards Bare Line feeds (mail is being forwarded by Linux to exchange) maybe an issue with the format? Unsure how to verify, found this link:

http://www.dylanbeattie.net/docs/iis6_bare_linefeed.html

Any thoughts on how I should proceed? Can I increase logging to find why remote host is rejecting email? SMTP only reports 451+timeout (no reason).

I have been monitoring traffic in port 25 using Wireshark. Below is an extract:

quote:

No.     Time        Source                Destination           Protocol Info
   13 0.066367    192.x.x.x           85.158.139.3          SMTP     Command: MAIL FROM:<myemail@mydomain.com>
Frame 13 (83 bytes on wire, 83 bytes captured)
Ethernet II, Src: HewlettP_9d:bb:64 (00:1b:78:9d:bb:64), Dst: Sonicwal_1e:50:cc (00:06:b1:1e:50:cc)
Internet Protocol, Src: 192.x.x.x (192.x.x.x), Dst: 85.158.139.3 (85.158.139.3)
Transmission Control Protocol, Src Port: 37971 (37971), Dst Port: smtp (25), Seq: 27, Ack: 129, Len: 29
Simple Mail Transfer Protocol
No.     Time        Source                Destination           Protocol Info
   14 0.083471    85.158.139.3          192.x.x.x           SMTP     Response: 250 OK
Frame 14 (62 bytes on wire, 62 bytes captured)
Ethernet II, Src: Sonicwal_1e:50:cc (00:06:b1:1e:50:cc), Dst: HewlettP_9d:bb:64 (00:1b:78:9d:bb:64)
Internet Protocol, Src: 85.158.139.3 (85.158.139.3), Dst: 192.x.x.x (192.x.x.x)
Transmission Control Protocol, Src Port: smtp (25), Dst Port: 37971 (37971), Seq: 129, Ack: 56, Len: 8
Simple Mail Transfer Protocol
No.     Time        Source                Destination           Protocol Info
   15 0.083527    192.x.x.x           85.158.139.3          SMTP     Command: RCPT TO:<[email=remote-email@their-domain.co.uk]remote-email@their-domain.co.uk[/email]>
Frame 15 (99 bytes on wire, 99 bytes captured)
Ethernet II, Src: HewlettP_9d:bb:64 (00:1b:78:9d:bb:64), Dst: Sonicwal_1e:50:cc (00:06:b1:1e:50:cc)
Internet Protocol, Src: 192.x.x.x (192.x.x.x), Dst: 85.158.139.3 (85.158.139.3)
Transmission Control Protocol, Src Port: 37971 (37971), Dst Port: smtp (25), Seq: 56, Ack: 137, Len: 45
Simple Mail Transfer Protocol
No.     Time        Source                Destination           Protocol Info
   16 0.100464    85.158.139.3          192.x.x.x           SMTP     Response: 250 OK
Frame 16 (62 bytes on wire, 62 bytes captured)
Ethernet II, Src: Sonicwal_1e:50:cc (00:06:b1:1e:50:cc), Dst: HewlettP_9d:bb:64 (00:1b:78:9d:bb:64)
Internet Protocol, Src: 85.158.139.3 (85.158.139.3), Dst: 192.x.x.x (192.x.x.x)
Transmission Control Protocol, Src Port: smtp (25), Dst Port: 37971 (37971), Seq: 137, Ack: 101, Len: 8
Simple Mail Transfer Protocol
No.     Time        Source                Destination           Protocol Info
   17 0.100520    192.x.x.x           85.158.139.3          SMTP     Command: DATA
Frame 17 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: HewlettP_9d:bb:64 (00:1b:78:9d:bb:64), Dst: Sonicwal_1e:50:cc (00:06:b1:1e:50:cc)
Internet Protocol, Src: 192.x.x.x (192.x.x.x), Dst: 85.158.139.3 (85.158.139.3)
Transmission Control Protocol, Src Port: 37971 (37971), Dst Port: smtp (25), Seq: 101, Ack: 145, Len: 6
Simple Mail Transfer Protocol
No.     Time        Source                Destination           Protocol Info
   18 0.117900    85.158.139.3          192.x.x.x           SMTP     Response: 354 go ahead
Frame 18 (68 bytes on wire, 68 bytes captured)
Ethernet II, Src: Sonicwal_1e:50:cc (00:06:b1:1e:50:cc), Dst: HewlettP_9d:bb:64 (00:1b:78:9d:bb:64)
Internet Protocol, Src: 85.158.139.3 (85.158.139.3), Dst: 192.x.x.x (192.x.x.x)
Transmission Control Protocol, Src Port: smtp (25), Dst Port: 37971 (37971), Seq: 145, Ack: 107, Len: 14
Simple Mail Transfer Protocol
No.     Time        Source                Destination           Protocol Info
   19 0.117943    192.x.x.x           85.158.139.3          SMTP     DATA fragment, 1460 bytes
Frame 19 (1514 bytes on wire, 1514 bytes captured)
Ethernet II, Src: HewlettP_9d:bb:64 (00:1b:78:9d:bb:64), Dst: Sonicwal_1e:50:cc (00:06:b1:1e:50:cc)
Internet Protocol, Src: 192.x.x.x (192.x.x.x), Dst: 85.158.139.3 (85.158.139.3)
Transmission Control Protocol, Src Port: 37971 (37971), Dst Port: smtp (25), Seq: 107, Ack: 159, Len: 1460
Simple Mail Transfer Protocol
No.     Time        Source                Destination           Protocol Info
   20 0.117956    192.x.x.x           85.158.139.3          SMTP     DATA fragment, 163 bytes
Frame 20 (217 bytes on wire, 217 bytes captured)
Ethernet II, Src: HewlettP_9d:bb:64 (00:1b:78:9d:bb:64), Dst: Sonicwal_1e:50:cc (00:06:b1:1e:50:cc)
Internet Protocol, Src: 192.x.x.x (192.x.x.x), Dst: 85.158.139.3 (85.158.139.3)
Transmission Control Protocol, Src Port: 37971 (37971), Dst Port: smtp (25), Seq: 1567, Ack: 159, Len: 163
Simple Mail Transfer Protocol
No.     Time        Source                Destination           Protocol Info
   21 0.141443    85.158.139.3          192.x.x.x           TCP      smtp > 37971 [ACK] Seq=159 Ack=1730 Win=11680 Len=0
Frame 21 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: Sonicwal_1e:50:cc (00:06:b1:1e:50:cc), Dst: HewlettP_9d:bb:64 (00:1b:78:9d:bb:64)
Internet Protocol, Src: 85.158.139.3 (85.158.139.3), Dst: 192.x.x.x (192.x.x.x)
Transmission Control Protocol, Src Port: smtp (25), Dst Port: 37971 (37971), Seq: 159, Ack: 1730, Len: 0
No.     Time        Source                Destination           Protocol Info
   22 146.368919 85.158.138.99         192.x.x.x           SMTP     Response: 451 timeout (#4.4.2)