Interesting issue - I can receive e-mail, but can't relay apparently.

[mike_art03a]

Good day all,

I've been scouring the web and I can't seem to find an answer for my curious issue.

I'm running Ubuntu Server 10.04 LTS with ispCP Omega 1.0.7 and my issue is that I can't seem to send out e-mail, I can receive them in most cases, but sent messages get bounced back from their respective domains.

I've included a copy of the error report that I get from Gmail, Hotmail also results in the same error. I can receive mail just fine as well. It seems to me that servers are assuming that I'm sending mail from a domestic IP (which mine shouldn't be) and not a 'mail server.'

---Error Report---
Subject: Undelivered Mail Returned to Sender
From: "Mail Delivery System" <MAILER-DAEMON@67.55.2.42>
Date: Wed, April 25, 2012 12:09 am
To: martelle@msrv.ca
Priority: Normal


This is the mail system at host admin.msrv.ca.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<michael.artelle@gmail.com>: host gmail-smtp-in.l.google.com[209.85.225.27]
said: 550-5.7.1 [67.55.2.42] The IP you're using to send mail is not
authorized to 550-5.7.1 send email directly to our servers. Please use the
SMTP relay at your 550-5.7.1 service provider instead. Learn more at 550
5.7.1 http://support.google.com/mail/bin/answe...swer=10336
b7si14722466icw.13 (in reply to end of DATA command)