Re: Sendmail config: sending emails with LAN IP vs. domain
From: Dorsai (dorsai_at_mail.com)
Date: 03/17/05
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Date: Wed, 16 Mar 2005 16:54:26 -0700
On Wed, 16 Mar 2005 10:39:08 -0900, Kevin Miller fondled the keyboard
until generating:
...<snip>
> I think you need to do a couple things but w/o seeing your setup it's
> hard to say for sure.
>
> First, make sure you have reverse entries in your DNS for your mail
> server so that if a receiving mail server (i.e., one you're sending to)
> can do a reverse lookup to validate. Many mail servers are configured
> to reject mail from hosts w/o valid forward and reverse entries. The
> reverse entry will need to be the outside address, not the internal
> 192.168.. entry. You may have to run two DNS servers for inside and
> outside. Bind can run different views for internal and external if you
> configure it that way.
>
> The other thing is look into setting MASQUERADE_DOMAIN. In /etc/mail/
> is a file called 'linux.mc' Edit the file, find the MASQUERADE_DOMAIN
> section, read about it, make the appropriate changes, and recompile the
> /etc/sendmail.cf file.
> ...Kevin
That masquerading bit sounds promising; I'll have a look at it. As for
reverse DNS, I've got MKRDNS, a perl script that handles generating the
appropriate files :-)
Yes, anything I edit gets the original file copied beforehand; I learned
*that* lesson the hard way!
Thanks for the response...
Dorsai
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