Re: Sendmail configuration question

[Bob McClure Jr <robertmcclure earthlink net>]

On Sun, May 19, 2002 at 10:58:28AM -0700, Mark Champion wrote:
> I'm a little confused.  In my /etc/hosts file, it specifically tells me not
> to change the first line
> 
>         127.0.0.1   localhost.localdomain localhost

That is correct.  You need that line.

> I have added an additional line that contains my ip address and my fqdn.
> That's ok, right?

That's absolutely correct.

> I don't think I've edited /etc/sendmail.cf, but I did edit
> /etc/mail/sendmail.mc and added
> 
>         DMhomeip.net - where homeip.net is my domain name (without my
> machine name).
> 
> That solved another problem is was having.

Hmm.  I presume that is a known domain.  You are saying you are
masquerading as that domain.

> I have not edited /etc/mail/local-host-names.  It contains only the original
> commented line
> 
>     # local-host-names - include all aliases for your machine here

That is OK.

> I can send mail to most other email addresses without problem.  I just have
> a problem
> with this one email address.
> 
> mchampion bigfoot com

This may be where you need to get friendly with the .mc file that was
the source for the sendmail.cf.  Your _envelope_ return address is
probably <your_username>@<machine_name>.homeip.net, and some MTAs are
not buying it.  I had the same problem.

First, make sure you have, or get the sendmail-cf package.  The .mc
file you need is /usr/share/sendmail-cf/cf/redhat.mc.  That's what
generated your /etc/sendmail.cf.  I'd leave it alone and copy it to
myown.mc, or whatever you want to call it.

First a note about the .mc file: the 'dnl' string is a comment
delimiter.

Add the line

 FEATURE(genericstable, `hash -o /etc/mail/genericstable')

If the "DM..." line, above really worked, then you should also make
sure there is a line:

 MASQUERADE_AS(homeip.net)

It will generate the line you want in the .cf file.  Then generate the
myown.cf file:

 ./Build myown.cf

Now go to the /etc/mail directory and create or add to the file
"genericstable" with the line

 <your_uid> mchampion bigfoot com

That will tell sendmail to translate your local userid in the
_envelope_ "from" address to a known email address.

Then save off the existing /etc/sendmail.cf.  You may need to back up
to it.

 cd /etc
 cp -p sendmail.cf sendmail.cf.works_mostly

Copy your new .cf into place:

 cp /usr/share/sendmail-cf/cf/myown.cf sendmail.cf

And restart sendmail:

 /etc/init.d/sendmail restart

If you have a problem, restore the old sendmail.cf and restart
sendmail.  Otherwise, try it out.

There is a whole world of info about the .mc file in
/usr/share/doc/sendmail/README.cf from the sendmail-doc package.

Cheers,
-- 
Bob McClure, Jr.            | We have enough youth.
Bobcat Open Systems, Inc.   | How about a fountain of SMART?
robertmcclure earthlink net |