all IMAP service in the mail servers should contactable via telnet by the port ?

Posted on 2011-09-25
Last Modified: 2012-05-12
Hi Experts,

I was trying to trouble shoot IMAP service on a mail server. But it's not connecting via telnet. I was trying to perform  (But SMTP port connects via telnet without any issue)

Some mail servers denied connecting to IMAP port via telnet ???

If so how can I remotely verify the IMAP service. ( we don't have access to the mail server any way)

Thanks a lot for your time !
Question by:Shakthi777
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Assisted Solution

PYThePorkpie earned 500 total points
ID: 36597457
You don't mention the version but if SMTP works on port 25 and IMAP fails on 143 then its most likely the MSExchange IMAP service is not started on that server.

Author Comment

ID: 36597481
Ya, I'm sure about the port numbers.

I can't telnet to the IMAP port, but I can telnet to the SMTP port on the same email server (EXCHANGE) which really means IMAP port on the particular server is down ??

Accepted Solution

PYThePorkpie earned 500 total points
ID: 36597879
Yes it suggests that the Microsoft Exchange IMAP4 service is not running. You've proved the server is running by your success in getting an SMTP response. The IMAP4 service is set to manual by default as not everyone wants to use it.
Hope that helps.
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Author Comment

ID: 36597990
it's bit complicated;

The email functionality in the production server is not working but development server is good with the same email functionality which use IMAP(993) on the same email server.

I have telnet to 993 from both Development and Production servers but connection refused. I can't imagine that how I going figure this.

Any help would be highly appreciated.

Assisted Solution

PYThePorkpie earned 500 total points
ID: 36598156
Check out the following link on the Exchange team Blog. If you have verified that the service is running if its left in the default config its locked down to only accept SSL?TLS connections.

Author Closing Comment

ID: 36953462
tnx !

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