[CentOS] sendmail mail relay backscatter issue.

On 2/5/2010 9:53 AM, Simon Billis wrote:

>
>>> SNIP
>
>>
>> What are you currently using in mailertable to get there?  If you use
>> [domain] and go to the A record of the same name it might be a problem
>> - but that might work if you try it.  Where I've used it, the delivery
>> hosts had their own names that they'd accept in the envelope and the
>> [IP.address] form would also work.
>
> Currently I have this in the mailertable:
> domain(1).com                     smtp:smtp2.differentdomain.com
> domain(2).com                     smtp:smtp2.differentdomain.com
> ...
> Domain(n).com                     smtp:smtp2.differentdomain.com
>
> I think that I'm going to have to test this out and see what happens.

I think it should work to put the smtp2.differentdomain.com in the 
virtusrtable target as long as the destination accepts that as a local 
name - and you'd have to go out of your way to avoid it if it is the 
real hostname or reverse DNS name for the interface.
-- 
   Les Mikesell
    lesmikesell at gmail.com