Rejecting Unknown Non-Local Users with MailScanner (4.47.4-2)

[John Rudd]

On Apr 30, 2006, at 2:37 PM, Brent Addis wrote:

> Michele Neylon :: Blacknight.ie wrote:
>> Bernard.Lheureux at ibsbe.be wrote:
>>
>>> I'm looking for a solution that could allow me to reject unknown
>>> non-local users mails that come through a MailRelay (MailScanner
>>> 4.47.4-2) but not with posfix, I use Sendmail to relay to an Exchange
>>> 2003 server.
>>> All the soluces that I found are made for Postfix...
>>> I suppose it should also exist for sendmail, do you have an idea 
>>> where I
>>> could find infos about it ?
>>>
>>>
>>
>> Milter ahead
>>
>>
>>
> Does sendmail not do some sort of callout verification? Most other 
> MTA's I have used since dropping Sendmail have supported it for a long 
> time.
>
> Why run Milter if your MTA has most everything milter does built in?
>
> http://grep.be/blog/en/retorts/milter-ahead.php?show_comments=yes
>

Why include in core functionality something which can be modular, site 
specific behavior, and optional?  Why not leave it to "plug-ins" (which 
is what milters are)?

Another answer to the original question:

mimedefang   (another sendmail milter, and VERY flexible)