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

[Blammo]

On 03 Jan 2005 CHANGE USERNAME TO westes entered spamcop.help and left
news:crcdjh$u64$1 at news.spamcop.net: 

> Many sites on the Internet no longer accept mail if the reverse IP
> does not match the forward IP, using the domain name that sendmail
> announces when it connects while sending mail.   I understand how to
> handle reverse delegation to make these match for a simple case, but I
> have a question for a more complex case.
> 
> We have our mail server connected to two different networks, for
> redundancy. For receiving incoming mail, this works great, and we can
> set the MX records to mail1.mysite.com and mail2.mysite.com, each of
> which resolves to an IP on a different network.    Now how do I handle
> outgoing mail?   One solution would be to have the generic host
> mail.mysite.com resolve to two different IP addresses.   But I'm
> thinkingt that may cause problems.   The reverse delegation for the
> two different IP addresses should show one hostname (i.e.,
> mail.mysite.com), but would there be other issues that make using more
> than one IP for sending mail problematic? 
> 

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



-- 
| Ric
|