[cobalt-users] RE: RaQ3i - Sendmail 8.9.3 configuration issues (was Sendmail upgrade to 8.12.8 issues?)

["Dave Reid" <daver1@xxxxxxxxxxxxxxx>]

|> -----Original Message-----
|> From: cobalt-users-admin@xxxxxxxxxxxxxxx 
|> [mailto:cobalt-users-admin@xxxxxxxxxxxxxxx] On Behalf Of Jeff Lasman
|> Sent: Monday, March 24, 2003 9:33 PM
|> To: cobalt-users@xxxxxxxxxxxxxxx
|> Subject: Re: [cobalt-users] RaQ3i - Sendmail upgrade to 
|> 8.12.8 issues?
|> 
|> 
|> Dave Reid wrote:
|> 
|> > I have a some questions and a request resulting form a 
|> major meltdown 
|> > with our SMTP and SPAM! We were getting so many spam's relaying 
|> > through it was shutting down our SMTP server, this was a result of 
|> > having added yahoo.com and yahoo.ca to the allowed Relays 
|> because of 
|> > some serious whining from a couple of clients who had 
|> friends using a 
|> > yahoo email address.
|> 
|> If your sendmail is set up properly you don't have to add 
|> yahoo.com or yahoo.ca just for own users to be able to 
|> receive email from yahoo, and send email to yahoo.
|> 
|> > It took me a little while to figure out the cause, I knew 
|> it was spam 
|> > killing the server but did not know what to do about it, I tried 
|> > updating sendmail, blocking out huge blocks of IP #'s 
|> manually in the 
|> > hosts.deny file, but nothing worked until I removed yahoo.com and 
|> > yahoo.ca from the allowed relay section.
|> 
|> Right.  They shouldn't be there.  But you shouldn't need them there.
|> 

********************** reply ************************
Ok, I have now removed all domains except ones we host from the Host
Relay section. Of course now I am back to the first issue, when I try
and send an email to a domain we don't host, I get a "550 Relaying
Denied Error".

1st) Is this something I can solve through the GUI?, or do I need to
configure manually. Is this a DNS issue, or a sendmail issue?. I do have
an MX record for each domain. [www.mydomain.com sends high priority mail
to mydomain.com]. SOA for each domain specifies primary and secondary
DNS servers.

2nd) Can someone recommend a good book and/or online documentation on
Sendmail configuration?

Thanx for all the help so far

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