In
<Pine(_dot_)LNX(_dot_)4(_dot_)44(_dot_)0505161455300(_dot_)7770-100000(_at_)bmsred(_dot_)bmsi(_dot_)com>
"Stuart D. Gathman" <stuart(_at_)bmsi(_dot_)com> writes:
I just had an idea for a simple shared MTA policy mechanism.
Suppose an SMTP service has domain 'service.com' and a client
logs in to SMTP AUTH as 'curly' and gives a MAIL FROM of
'moe(_at_)example(_dot_)com'.
The service then looks for a DNS A record at:
moe._using_.paul._at_.service.com._smtpauth_.example.com
MTAs that allow people to send out email with a MAIL FROM other than
their own should do egress SPF checks. That is, it should check to
see if the MTA is allowed to send email using that domain.
If MTAs do that, then the above check can already be done with an
exists: check.
-wayne