Author: Jeremy Harris Date: To: exim-users @ exim. org Subject: Re: [exim] about Sender: and envelope reverse-path in today's systems
Marc Haber wrote: > On Sat, 20 Nov 2004 17:30:42 -0500 (EST), "Greg A. Woods"
> <woods@???> wrote:
>>Then that person should not be running an MTA. They should be
>>configuring their mail reader to send mail directly to their ISP's MTA.
>
>
> Welcome to the beautiful world of UNIX on mobile clients where you
> -need- some kind of local queue.
At least some MUAs have a "work offline" mode, which provides such a queue.
> A very common configuration in Germany is that a site has a DSL line
> with dynamic IP address (forced to change every 24 hours) and has a
> simple NAT router to the outside. In these cases, the originating host
> does not know its public IP address and cannot set the message-ID and
> its HELO appropriately.
So don't run an MTA.
>
> Additionally, a message might be queued when the host has IP address
> a.b.c.d (having its message-ID generated appropriately), but might go
> out later after the dynamic IP has changed.
> So don't run an MTA.
