sendmail/mailertable question

[Charles Swiger]

On Oct 24, 2005, at 6:38 PM, stan wrote:
> I have a machine that hosts several virtual domains. The domains
> have wildcarded DNS records.
>
> I want mail recived for say "foo at listmaint.samp.ivosite.com" to get  
> passed
> on downstream like that without striping out the "listmaint" part.
> I think I can do this with mailertable.

Get rid of the "hash -o" in your mailertable line, too.  Your DNS  
wildcard MX records are telling sendmail that the mail should go to  
prod1.ivo.net:

;; QUERY SECTION:
;;      listmaint.samp.ivosite.com, type = MX, class = IN

;; ANSWER SECTION:
listmaint.samp.ivosite.com.  1H IN MX  10 prod1.ivo.net.

If you want to disable DNS canonification, do something like this in  
your mailertable:

listmaint.samp.ivosite.com    smtp:[IP_of_real_MX]

...where IP_of_real_MX if the IP address of the machine which is  
supposed to actually handle the mail for that machine, and is  
different from prod1.ivo.net.  You can't fool your wildcard DNS  
record otherwise, because even if you try, remote SMTP hosts will  
look up the MX anyway.

This is also why the usage of wildcard MX records is highly discouraged.

-- 
-Chuck