[SC-Help] Re: How to Handle Reverse Delegation for Muti-IP mail Host

[Will]

I'm making a different point.   Let me provide an example.    I'm going to
use private IP addresses, but imagine these were public IPs.

    host1.mysite.com    192.168.1.1
    host2.mysite.com    192.168.10.1

    host.mysite.com will have *both* forward and reverse set as:

                                        192.168.1.1
                                        192.168.10.1

So sendmail will announce host.mysite.com on all outgoing mail.    A reverse
IP check of either IP above will match host.mysite.com.

The problem is that the *forward* lookup on host.mysite.com will give *two*
IP addresses.   And what I am asking is will that cause problems for all of
these virus checkers out there that are rejecting 1/2 the valid e-mail they
receive from business correspondents based on some minute imperfection in
the DNS record setup.    If most software will only use the host
announcement by sendmail and a reverse IP lookup, then it is okay.   If
software does a forward lookup and is not written to deal with more than one
IP, then it could cause problems.

-- 
Will
westes AT earthbroadcast.com



"Blammo" <ric.gates at bigsleep.org> wrote in message
news:Xns95D3CEF04E012blammo at 216.154.195.61...
> Two Sendmail daemons.
> Sendmail will only use the primary domain for the server it's running on,
> or the domain it's set to - which should match the PTR of the outgoing
> connection IP anyway. Sounds like you are having problems because you set
> the domain to something else, or sendmail is not able to get the correct
> name.
> http://www.sendmail.org/m4/tweaking_config.html#confDOMAIN_NAME
> The MX names have nothing to do with it.
>
> -- 
> | Ric