Hi folks,

Sorry for the long question, but after all, it's sendmail.

I'm trying to set up sendmail to masquerade my workstation as my domain. That is, I am prn@foo.bar.com (actual addresses obviously changed for spam protection ) and I want my mail to go out as prn@bar.com. So far that seems like a fairly standard thing to do. In fact, I have done it successfully with other (Solaris) systems.

With sendmail version 8.3.8-2 on FC6, I have edited my sendmail.mc file to include the lines:

Now I run m4 with the command:
and it does create a new sendmail.cf file for me, but there is no
DMbar.com
line, and certainly no other lines relating to masquerading.

I DO have the sendmail-cf package, viz:
I have also tried to add the line:
directly into my sendmail.cf and then I have restarted sendmail (with "/etc/init.d/sendmail restart"). My only "exposed user" is root, either in the .mc file or in the .cf file, but my test messages still arrive as being from prn@foo.bar.com instead of prn@bar.com. I presume that the other features may have something to do with this, but I'm not sure how to add things like "masquerade_envelope" or "masquerade_entire_domain" to the sendmail.cf file directly.

The "headers" in sendmail.cf that show which files from /usr/share/sendmail-cf/feature have been included in the processing list things like mailertable.m4 and redirect.m4, but do not include masquerade_entire_domain.m4 or masquerade_envelope.m4 (which seems somewhat logical since it perversely doesn't seem to be doing the basic masquerading at all).

Ideally, of course, I'd much rather edit sendmail.mc (as the headers of sendmail.cf say I should) and let m4 do the heavy lifting, but in a less than ideal world I may have to be satisfied with editing sendmail.cf if that can be made to work. But the basic question is why m4 is ignoring the "MASQUERADE_AS" line in the first place.

Any clues gratefully accepted.
Thanks,
Paul

The header for my sendmail.mc in FC6 says:

Why don't you give that a try?

I forgot to mention that I had tried that also. It does the same thing, i.e., making sendmail.cf from sendmail.mc with the same command. (The Makefile obviously does some other things too, but that's the relevant one.)

So, no luck.

Thanks anyway.

Best Regards,
Paul

You'll also need:

(or whatever your upstream email server is called).

Are you sure I need that? I don't want an upstream server getting into the act here. I just want to send the mail directly from the Linux box, not through the exchange server.

As a matter of fact, another (Solaris) box that seems to do the right thing definitely does not have SMART_HOST defined. Its sendmail.cf has:
In any case, I know that the Linux box can send email, it's just not masquerading.

Thanks,
Paul

You don't need the smart_host if you have no upstream email server. I just noticed that you have the required statement commented out:

should be:

DOH! Of course! I completely spaced out on that! I was thinking of and questioning everything but the obvious.

Thanks,
Paul