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I understand that concept. However, this does not apply to email originating from our server. I can require that all of OUR users authenticate before they are allowed to submit email (any other domain on the Internet can submit email without authentication). This does work because as I stated when I connect to the SMTP port and send the FROM command with an account within our domain I immediately get a notification that the account requires authentication before submitting email. I don't understand how the spammers appear to be bypassing this. I'll need to check out the server logs to see if I can find any additional information.
The exact error message when using a CGP domain account
575 david.modoski@mydomain.com sender requires authentication
-----Original Message-----
From: CommuniGate Pro Discussions [mailto:CGatePro@mail.stalker.com] On Behalf Of Lyle Giese
Sent: June 26, 2009 8:21 AM
To: CommuniGate Pro Discussions
Subject: Re: Sending FROM accounts in domain even with authentication enabled
David Modoski wrote:
> We have authentication enabled for all of our CGP accounts for sending
> email. This requires that the account holder authenticate to the
> server before submitting mail. I've tested by connecting to the SMTP
> port and using a FROM address within our domain (I'm informed by the
> server that this account needs to authenticate before sending mail).
> However, I've just started receiving SPAM that is address FROM an
> email account within the domain. Anyone have any ideas how that might
> be getting through?
>
> Thanks,
> Dave
>
This requirement is for relaying email, not sending email. You may say
what's the difference? Relaying means the email will be relayed/sent to
another email server. Sending can include email for here.
If you required Authenication for all email, you will be unable to get
email from the world as other mail servers won't be able to send email
to your domains.
Lyle Giese
LCR Computer Services, Inc.
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