I think Sendmail m4 configs are setup that way out of the box at the moment.

I know my fc5 distro is, not sure about the SuSe 10.x distro I have TMDA 
installed on.

I will have to check, perhaps experiment a bit and try it.

-gc

Stephen Warren wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Gregory Carter wrote:
>   
>> Obviously, I could put my domain in the domain senders file, but that 
>> won't work well as spammers use my return domain sometimes to send mail.
>>     
>
> You should configure your mail server(s) not to accept email that says
> it's (envelope) "from" your domain, unless it really is (i.e. if it was
> injected via a local process, authenticated SMTP connection, from an IP
> in your LAN etc.)
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>
> iD8DBQFFv6/Mhk3bo0lNTrURAmdAAJ9NT2R8+EZ3pbsh5J/C23Zh5T1+iwCg1jPu
> AvfDdGoKtNxSPrIyMXE3Uko=
> =zLJZ
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>   

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