On a linux client with bind: I have forward records for multiple zones pointing to the same ip.
Now I want to add the reverse records to the reverse zone for that subnet.
To which of the domains should I point the reverse record?

For example, I have:

Forward zones:
domain1.com
www IN A 192.168.0.10

domain2.com
www IN A 192.168.0.10

I have this reverse zone for that subnet:
192.168.0
10 IN PTR www.domain1.com


What is the logic of the last RR?
10 IN PTR www.domain1.com

Why shouldn't that point to: www.domain2.com
10 IN PTR www.domain2.com

Why does it matter? I guess it would be a problem when email servers on another clients end decide to do reverse lookups and find domain2 where they want domain1?
So that basicly means i can only send email from one domain when i have multiple domains located on one apache server?
Are there any other security related issues to this problem?

Thanks for any hints/tips!

In most cases, those that do a check... do the following:

1. For IP...
2. Do a reverse lookup (IP -> name)
3. Do a forward lookup (name -> IP2)
4. Does IP = IP2

So... for many things that check.. you are probably fine.

thanks!
I anybody else has more info on this, feel free to enlighten me