OT: Multiple Outgoing IPs?

Jim Coates jimc at laridian.com
Mon Apr 2 21:50:25 IST 2007



> -----Original Message-----
> From: mailscanner-bounces at lists.mailscanner.info 
> [mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf 
> Of Alex Neuman van der Hans
> Sent: Monday, April 02, 2007 2:48 PM
> To: MailScanner discussion
> Subject: Re: OT: Multiple Outgoing IPs?
> Importance: High
> 
> 
> Doc Schneider wrote:
> > Jim Coates wrote:
> >   
> >>> -----Original Message-----
> >>> From: mailscanner-bounces at lists.mailscanner.info
> >>> [mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf 
> >>> Of Paul Kelly :: Blacknight
> >>> Sent: Monday, April 02, 2007 2:31 PM
> >>> To: MailScanner discussion
> >>> Subject: Re: OT: Multiple Outgoing IPs?
> >>>
> >>>
> >>> Jim Coates wrote:
> >>>       
> >>>> Hey gang...
> >>>>
> >>>> This is totally off-topic, but I know there are some very smart
> >>>> individuals here who might have some ideas for me.
> >>>>
> >>>> The company I work for recently purchased another company (both
> >>>> companies are very small).
> >>>>
> >>>> Because of how we track bonded sender info and such, I 
> need to have
> >>>> both domains (one for each company) sending outgoing mail 
> >>>>         
> >>> on different
> >>>       
> >>>> IPs.
> >>>>
> >>>> Ideally, I don't want to add another mail server and would
> >>>>         
> >>> like to be
> >>>       
> >>>> able to take advantage of all the filtering and such that I have
> >>>> enabled on the existing *nix based mail server.
> >>>>
> >>>> I've been told that it is not possible to set outgoing IPs in
> >>>> SendMail, so I'm looking for suggestions of how I might 
> be able to 
> >>>> make this work.
> >>>>
> >>>>         
> >>> Could you explain a little bit more as to what you need? 
> I'll ask a
> >>> question or two so I can clarify what I think you want to do.
> >>>
> >>> You have an existing scanning machine where domain1.com
> >>> lives, is that 
> >>> correct?
> >>>
> >>> You want domain2.com to have its inbound e-mail sent to 
> this box and
> >>> have it delivered onto another mailserver by IP address, is 
> >>> that correct?
> >>>
> >>> If you could answer that, I'll see what might work for you.
> >>>
> >>> Paul
> >>>
> >>>
> >>>       
> >> Paul,
> >>
> >> Here is exactly what I need:
> >>
> >> Domain one and domain two both already come inbound to the 
> same box 
> >> via unique DNS mail records that both point to the same 
> IP.  SendMail 
> >> is currently configured to accept both domains and route them to 
> >> local users (which is exactly how I want it to work on that end).
> >>
> >> I don't need to relay to another box, what I am looking to 
> do is take 
> >> mail originating from the mail server and send it outbound from a 
> >> different IP.
> >>
> >> For example, if I send an email to you as "jim at domain.one" it will 
> >> come from one IP address.  If I send you an email as 
> >> "jim at domain.two", I want it to come from a different IP address.
> >>
> >> I have multiple public IPs available to my box, I just 
> don't know if 
> >> its possible to configure SendMail to always associate a 
> particular 
> >> outbound domain with one IP and another outbound domain 
> with another 
> >> IP.
> >>
> >> Does that make sense?
> >>
> >> What we are trying to do is separate out the email so that bonded 
> >> sender information for one domain is not affected by the 
> bounces and 
> >> such from another domain.
> >>
> >> Thanks,
> >> Jim
> >>
> >>     
> >
> > Check out genericstable. I use it with sendmail to have different 
> > users come from different domains.
> >
> > Example:
> > user1   user1 at domain.one
> > user2    user2 at domain.two
> >
> > As long as the domains are different IPs it should do what you're 
> > wanting.
> >
> >   
> Not exactly. He means "use a different IP address for every outgoing 
> connection depending on the domain name used for the 
> message". Not sure 
> if he means the domain on the *envelope* or on the *header*, 
> which are 
> two different things.
> -- 


That is a good question, Alex.  I'm not sure which it should be either.

I am assuming the IP of the header domain.

Jim



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