Re: [exim] Outgoing Hostname and IP

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Auteur: W B Hacker
Date: 2006-10-23 23:26 -000
À: exim users
Sujet: Re: [exim] Outgoing Hostname and IP
Grant Peel wrote:

> Hmmm,
>
> All my hosts have thier own IP and every IP resolves back (rDNS) to the
> domain it belongs to.
>
> -G


Quite the reverse of shared-IP virtual hosting!

You are not only in a good position to have Exim use the appropriate HELO for
each IP, you *should* do so. Optionally the smtp 'banner' and certs as well.

You can do this with a separate configuration per-IP invoking a 'listener'
daemon for each, or all within one, or on groups of 'n', even - this by use of
the '$interface' and 'helo_data' tools with conditionals, etc.

There are pros and cons to each approach - what you do with the queue(s), for
example.

There are examples in the list archives.

Bill


>
>
> ----- Original Message -----
> From: "Dave Lugo" <dlugo@???>
> To: <exim-users@???>
> Sent: Monday, October 23, 2006 10:31 AM
> Subject: Re: [exim] Outgoing Hostname and IP
>
>
>
>>On Mon, 23 Oct 2006, Renaud Allard wrote:
>>
>>>If I understand you well, you would like exim to make a HELO reflecting
>>>sender's domain name? I don't think you can configure exim in such a way.
>>
>>I think you can...
>>
>>
>>>Furthermore IMHO that would be a bad idea as you HELO/RDNS wouldn't
>>>match and some sites filter on this. Some people also filter on IPs with
>>>changing HELOs as they mostly are zombies.
>>>
>>
>>...and for the reasons enumerated above, it's a bad idea.
>>
>>-- 
>>--------------------------------------------------------
>>Dave Lugo   dlugo@???    LC Unit #260   TINLC
>>Have you hugged your firewall today?   No spam, thanks.
>>--------------------------------------------------------
>>Are you the police?  . . . .  No ma'am, we're sysadmins.

>>
>>--
>>## List details at http://www.exim.org/mailman/listinfo/exim-users
>>## Exim details at http://www.exim.org/
>>## Please use the Wiki with this list - http://www.exim.org/eximwiki/
>>
>>
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