Testing cPanel mail server on MXtoolbox

Using a cPanel server? Getting “Timeout waiting for response after 15 seconds” error or exclamation mark on some SMTP tests on MXtoolbox?

SMTP test failed!It’s quite easy to fix. First of all, you have to login to WHM and to Exim Configuration Manager. Find the “Introduce a delay into the SMTP transaction for unknown hosts and messages detected as spam” option and set it to “off”.

Now, your SMTP test should look something like this:

SMTP test successful!


How to troubleshoot spam issues with Exim

Check amount of mail in queue

# exim -bpc

As you can see, we have a pretty decent amount of mail in our Exim queue.

Now, let’s list all messages in the queue and pick a random message ID to check its’ header.

 # exim -bp
 4d       1cuyBm-0000Cu-3h <root@server.example.com>
 208P Received: from $user by server.example.com with local (Exim 4.82)
(envelope-from <$user@server.example.com>
id 1cuyBm-0000Cu-3h
for test@server.com Sat, 21 Mar 2015 21:03:06 -0400
027T To: mail@server.com
019 Subject: Hello!
091 X-PHP-Script: domain.com/uploads/page.php for "$IPADDRESS"
023 X-Priority: 3 (Normal)

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