[PLUG] Sendmail Configuration

[Paul Heinlein]

On Sat, 12 Feb 2005, Kenneth G. Stephens wrote:

> I have been getting postmaster messages saying I am relaying so SPAM.
> How do I check my configuration at may mail server; mail.cadtocam.com?

I suspect that the postmaster messages are due to a) spammers sending 
out messages with (forged) cadtocam.com From: headers, which leads to 
b) remote sites bouncing those messages (erroneously) back to your 
server.

In any event, mail.cadtocam.com doesn't allow relaying:

[heinlein]$ telnet mail.cadtocam.com 25
Trying 216.99.217.169...
Connected to mail.cadtocam.com.
Escape character is '^]'.
220 mail.cadtocam.com ESMTP Sendmail 8.13.1/8.13.1; Sat, 12 Feb 2005 
09:58:08 -0800
ehlo client.comcast.net
250-mail.cadtocam.com Hello c-24-22-105-76.client.comcast.net 
[24.22.105.76], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-AUTH DIGEST-MD5 CRAM-MD5
250-DELIVERBY
250 HELP
mail from: <heinlein at cse.ogi.edu>
250 2.1.0 <heinlein at cse.ogi.edu>... Sender ok
rcpt to: <heinlein at madboa.com>
550 5.7.1 <heinlein at madboa.com>... Relaying denied

-- Paul Heinlein <heinlein at madboa.com>