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Exchange SMTP Problems!

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Old 19 February 2005, 09:24 PM
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SinghSuperStud
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Default Exchange SMTP Problems!

Hi,

have pointed my MX record to my Exchange 2003 server and done port mapping of port 25 using my port-forwarding options in my router.

Added the domain to default recipient policy in Exchange and added/checked addresses for Active Directory users - all is good !

Done a ping for mail.abcd.co.uk and it resolves to my exchange server ... so far so good !

Send emails from outside of my domain, eg, from hotmail account and they don't show up anywhere . Tried using message tracking options in Exchange system manager but no messages from SMTP, only POP3 connector(different domain). Before I did the mx record changes I received failure reports but since the propogation has taken place it appears that hotmail etc. sends.

Why can't i see these messages on my server ??!

Have refreshed GP using gpreset command.

HELP !!
Old 19 February 2005, 10:06 PM
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mega_stream
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Question

Have you tried a telnet connection to the IP address on port 25 from the Internet?
Old 19 February 2005, 11:17 PM
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SinghSuperStud
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Tried telnetting and using SMTP commands as per the Knowledgebase article by MS. I think the message is accepted but I can't see it in the message tracking thingy in Exhange!

Jai
Old 20 February 2005, 10:50 AM
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mega_stream
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Talking

If the telnet smtp command has worked you should get..

telnet mail.domain.ext 25
You should receive a reply like:

Connected to mail.domain.ext.

HELO

MAIL FROM: mail@domain.ext
250 2.1.0 mail@domain.ext... Sender ok
Now give the recipients address:

RCPT TO: mail@otherdomain.ext
250 2.1.0 mail@otherdomain.ext... Recipient ok

DATA
blah blah blah
.

The mail server should reply with: 250 2.0.0 ???????? Message accepted for delivery

Quit

The mailserver should reply with something like:221 2.0.0 mail.domain.ext closing connection

Connection closed by foreign host.


You should get that, if you do it's been sent and has got stuck on you mail server, if you don't get that something else isn't right and it's not got to your server.
Old 20 February 2005, 02:23 PM
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Cheers for your help mega_stream.

Tried as per your posting and all works well ! Message accepted and shows in my inbox in Outlook 2003. Tried sending from hotmail etc. and there seems to be no connection requests made to my server (used the SMTP server menu which shows current connections).

Done nslookup and set q=mx and the mail record resolves correctly to my exchange server !!

Can't work it out. My first time setting up SMTP for Exchange but I'm sure I've done everything right my end, especially as I can manually send using telnet into port 25.

My domain host is 123-reg and set up an 'a record' to my IP and then added mx record for mail. Could it be this ? Asked 123-reg support and they say I've done everything correct there.

Jai
Old 20 February 2005, 02:38 PM
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Incidentally, what is the '@' name record as this still points to my 123-reg holding page as does the 'www' name record.

Jai
Old 20 February 2005, 09:34 PM
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Hi,

update - when I tried telnet test it was internally, ie. from a lan connected machine.

Tried when I got home and nothing! The dos prompt window goes blank with a flashing cursor. After I press a few keys etc. it returns to the prompt!

Help !

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Old 21 February 2005, 10:56 AM
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Done some more tests, seems that not all nameservers have updated. Ie. tried sending via Nildram and that works fine but nothing else happening !

Jai
Old 21 February 2005, 11:34 AM
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stevencotton
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Originally Posted by impreza_sports_nutter
Tried when I got home and nothing! The dos prompt window goes blank with a flashing cursor. After I press a few keys etc. it returns to the prompt!
That's "normal" for Windows telnet from a DOS prompt and means it's connected, it's the world's most useless telnet client.
Old 21 February 2005, 03:14 PM
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sounds like replication issues to me..

steven,- recommend any intel based better ones? (Please dont say Extra!)
Old 21 February 2005, 03:25 PM
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What's Extra? I think Putty has a telnet side, and there's dtelnet for Win32.
Old 21 February 2005, 04:30 PM
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Hi,

how do I use nslookup to check a public server server ? Have also changed the MX record of another domain (air-tel.co.uk - should point to 82.133.34.212) that sits with another provider (Cobweb Solutions). My internet connection is with Nildram and the MX change has propogated to their DNS but wanted to check elsewhere.

If somebody doesn't mind telnetting into my server to test then drop me a PM please,

thanks, Jai
Old 21 February 2005, 04:39 PM
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set type=mx, nslookup is deprecated now though, and it may be implementation dependent.
Old 21 February 2005, 05:27 PM
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ran a check on www.checkdns.net and the mail mx check fails as the request time's out !!

sent a telnet'd test on the internal lan (server sits on the same network) and the thing works fine!

How do I get the pi**ing server to respond quicker ?!

Jai
Old 21 February 2005, 05:37 PM
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You have no control, changing MX is always painful because some servers will see different records during the switch.
Old 21 February 2005, 05:44 PM
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think we've got it !

Apparently Nildram block port 25 as standard so going to get that unblocked !!!

Can't believe it !!!

Jai
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