>>>>> Philip Hazel <ph10@???>:
[snip!]
>> Digression: The anti-spam research group has been arguing a lot
>> about improving the traceability of email. One of their suggestions
>> is to add an RR type to the DNS similar to MX records but for email
>> emitters rather than receivers. Email from a machine that isn't
>> listed as one of the return path's domain's email emitters is
>> therefore obviously forged.
> So I'm out in Uganda, as I will be next month, and the network is
> flaky, and I can't manage to reach my home server in order to send
> out mail from my laptop - I therefore try sending it straight out
> from the laptop, which is on some DHCP dynamic address... Sigh.
Perhaps register phlaptop.dyndns.org, and put in
IN RR phlaptop.dyndns.org
(or whatever the syntax will be) in a zone file for a zone you have
control over?