Email Troubles - where do I start?

[Black Hole]

Since the change to my new host, I've been encountering email troubles.

My old host would occasionally suspend my email permissions when they thought that the board was spamming. I would have them reset the mail server and everything would work again.

With my new host, I've had them reset my mail services, but even using Diagnostics I don't receive an email sent to myself.

My members are complaining that email notifications aren't working and since I approve all new members, any new registrations aren't able to confirm their registration.

Where should I start? I've looked through the email options within Admin CP and I've looked through CPanel....I don't see anything wrong.

I am able to receive mail sent to my domain (it automatically forwards to my Gmail account), but the forums are not sending out mail.

[Black Hole]

I discovered that I am able to receive mail sent to my email addresses, but the forums are still having troubles sending mail.

I received the following error in my spam box after sending a test email.....perhaps this helps...

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

[email protected]
Mail sent by user nobody being discarded due to sender restrictions in WHM->Tweak Settings

------ This is a copy of the message, including all the headers. ------

Return-path: <[email protected]>
Received: from nobody by server.nixism.com with local (Exim 4.68)
(envelope-from <[email protected]>)
id 1IUjJP-00072G-Iw
for [email protected]; Mon, 10 Sep 2007 09:28:23 -0400
To: [email protected]
Subject: vBulletin Email Test (With -f Parameter)
From: "[email protected]" <[email protected]>
Message-ID: <[email protected]>
MIME-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
X-Priority: 3
X-Mailer: vBulletin Mail via PHP
Date: Mon, 10 Sep 2007 09:28:23 -0400

You are receiving this email because your email address was entered as an email test at StangBangerz Forums.

The first step of this email test script has been completed. However, a formatting test is still necessary:

A paragraph break.
A single line break.

Another paragraph break.
Another single line break.
Another single line break.

If the above lines look correct, you are finished. The email features on your server are setup correctly.
If this email is run together on one line, there is possibly a configuration error with your mail server. Please ensure it is configured correctly.

[Steve Machol]

This is a server issue. Check those settings:

Mail sent by user nobody being discarded due to sender restrictions in WHM->Tweak Settings

[Black Hole]

Thanks Steve....

I don't think I have access to look at those settings, but I contacted my host support again and will ask them to look at that.