Matthias Andree:
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> Am 06.09.2011 19:30, schrieb Wietse Venema:
> > Matthias Andree:
> >> Greetings,
> >>
> >> I am in a situation where I would like to achieve either of these
> >> solutions:
> >>
> >> Alternative A:
> >>
> >> - have Postfix's smtp client talk through a command via stdin/stdout
> >> (instead of a TCP stream).
> >
> > Can you describe the problem instead of the solution? There may be
> > other solutions than the ones you have in mind.
>
> The problem is this:
>
> - I cannot connect to the remote SMTP relayhost via plain TCP, it's
> firewalled on all ports.
>
> - The relayhost does not offer submission STARTTLS or SSL-wrapped legacy
> ports.
>
> - I *can* (and am permitted to) connect to a computer in the same LAN as
> the SMTP server by SSH.
>
> - The authentication infrastructure only supports SSH-2 public/private
> key authentication.
You did not mention this, but does your machine have a static IP
address? Then (a cron job on) the machine in the remote LAN could
call out to your machine over TCP, or SSL over TCP, through an
appropriate hole poked in the local firewall. Sounds like a fun
Perl programming project.
Wietse
