"Tim Johnston" <[EMAIL PROTECTED]> writes:

> I am being maintained in technological poverty by internet services offered
> in this area. Dialup connections, no fixed ip, no real Domain Name. Yet I've
> got Linux networks with  a dozen or so users, that I've found it convenient
> to run mail transport on. So that all mail for users can be sent and
> received when the dialup connection comes up. Receiving with fetchmail, and
> sending with maildirsmtp.  Up until now, this has worked very well for me.

[...]

> If I have a mailbox, for example [EMAIL PROTECTED] . tmda will send out
> confirmation requests with Reply-To: [EMAIL PROTECTED] But what
> if isp does not recognize tim-bloodygreatbigtag as a valid mailbox ? then
> all confirmations will bounce, and tmda will not work, yes ?

That's correct.  One possibility might be if the ISP offers a domain
hosting package.  Often with those packages, a "default" mailbox is
provided where all unrecognized addresses in your domain are
delivered.  You could possibly then retrieve from that mailbox and
re-distribute the message (using fetchmail) through your local SMTP
server.  That's about the only way I can think of to make a dial-up
situation work where the ISP doesn't recognize extension addresses.

> Unless a header field other than Reply-To: can be tagged instead,
> yes ? If that can be configured, then I haven't been able to figure
> out how to do this, so I thought that I would seek words of wisdom
> from this mailing list. Any such word received with appreciation.

Unfortunately, no other header field can be tagged.  The reality is
that, with nearly all mail clients, the only header fields that make
it into a reply are either Reply-To: or From: (Reply-To: takes
precedence), Message-ID: and Subject:.  TMDA doesn't currently support
cryptographically tagging either Message-ID: or Subject:, although
both ideas have been mentioned in the past.  There simply hasn't been
enough need/demand to make it happen.


Tim

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