On Mon, 16 May 2005, Stuart D. Gathman wrote:
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
I forgot to mention that if the client is using SRS/SES/VERP/whatever,
then he can use a wildcard:
*._using_.paul._at_.service.com._smtpauth_.example.com
If he wants to match the user, he'll have to use a custom DNS server
to strip the SES/SRS sig, creating the equivalent of:
*=moe._using_.paul._at_.service.com._smtpauth_.example.com
; not legal bind syntax - means match any name ending with '=moe'.
--
Stuart D. Gathman <stuart(_at_)bmsi(_dot_)com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flamis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.