Re: Outgoing IP address - CONTINUED - IGNORE PREVIOUS

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Outgoing IP address
\ Noah Silverman (14 Jan 2008)
. \ Victor Duchovni (14 Jan 2008)
. \ Noel Jones (14 Jan 2008)
. . \ Noah Silverman (14 Jan 2008)
. . \ Noah Silverman (14 Jan 2008)
. . . \ Noel Jones (14 Jan 2008)
. . . \ mouss (14 Jan 2008)
. . . . \ Victor Duchovni (14 Jan 2008)
. . . . . \ Noah Silverman (14 Jan 2008)
. . . . . . \ Victor Duchovni (14 Jan 2008)

Subject:	Re: Outgoing IP address - CONTINUED - IGNORE PREVIOUS
Group:	Postfix-users
From:	Victor Duchovni
Date:	14 Jan 2008

On Mon, Jan 14, 2008 at 01:13:44PM -0800, Noah Silverman wrote:

> Thanks,
>
> Really good explanation!
>
> That really helps me understand how Postfix works. (Been using it for
> years, but never really understood the whole thing.)
>
> So, to set outgoing mail on a specific interface, I should be able to
> just have the following in master.cf????
>
> smtp unix - - n - - smtp
> -o smtp_bind_address=x.x.x.11

With the "-o" option suitably indented...

> Now I'm wondering if I can get "fancy" with this. This machine hosts
> two domains. Each resolves to one IP. It would be really nice if
> Postfix sent e-mail out from the correct corresponding IP depending
> on the domain name of the sender.
> i.e.
> Mail from bob comes from x.x.x.10
> Mail from bob @domain2.com comes from x.x.x.11

No. This does not work correctly, because the transport is a function
of the recipient address. This is a non-problem. Don't solve it.

If different customers need different MTA personalities use separate
Postfix instances on the same or multiple machines.

--
Viktor.

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