Mail Server Running but not receiving emails

Archie Makuwa asked:

I am running Ubuntu and I am trying to setup my mail server using ISPConfig 3. Here is the error I am getting:

Mail Queue (Server :
Data from: 2014-07-16 12:40
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
0D0FA25451 627 Wed Jul 16 03:21:02 [email protected]
(connect to[]:10024: Connection refused)
[email protected]

AC0AF23289 628 Wed Jul 16 12:19:01 [email protected]
(mail transport unavailable)
[email protected]

AE3462545B 679 Wed Jul 16 06:55:19 [email protected]
(mail transport unavailable)
[email protected]

50C5425443 679 Wed Jul 16 01:24:04 [email protected]
(connect to[]:10024: Connection refused)
[email protected]

-- 3 Kbytes in 4 Requests.

NB: domain (my domain is not domain) 

Whenever I sent emails to the created mailboxes, they do not come through. An error from my gmail account is as followS:

Technical details of temporary failure:

The recipient server did not accept our requests to connect. 
Learn more at
[(0) []:25: Connection dropped]

My answer:

Whatever service you configured to run on port 10024 is not running. Inspect your /etc/postfix/ to find out what service it is, if you don’t already know, and then start the service.

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