Not directly in Exchange. With E2k, you could write a protocol sink[1] that intercepts the HELO and MAIL FROM commands, but I haven't seen anyone pushing forward with this type of solution (at least not publicly), since it requires coding in C/C++ or Delphi.
Ideally, I'd love to see someone write an E2k version of SMTPD fr0m Obtuse (http://www.obtuse.com/smtpd.html). Roger ------------------------------------------------------ Roger D. Seielstad - MCSE MCT Senior Systems Administrator Peregrine Systems Atlanta, GA http://www.peregrine.com [1] While this functionality could be written into a transport sink, doing so would violate the spirit, if not the letter, of RFC 2821. By the time a message gets to a point where a transport event would fire, its already been accepted for delivery via SMTP, meaning that the system will try by any means possible to deliver it to it's destination. Doing this at the protocol level (in response to a MAIL FROM or HELO/EHLO) doesn't violate the RFC, however, because you're rejecting it rather than accepting the DATA stream. > -----Original Message----- > From: Murphy, Brian [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, November 20, 2001 3:27 PM > To: Exchange Discussions > Subject: Verify Sender > > > Is there a way to get Exchange to validate sender's address prior to > delivery to internal valid user. In other words, is there a > way to validate > the sender's domain is legit. > > Example: > I have setup a standalone Exchange box that is configured to reroute > incoming smtp but has routing restrictions enabled. However > then box is > setup to "relay" for my domain only. The system is > configured to "Forward > all messages to host" (my other Exchange Server). > > The other Exchange server is setup to "Reroute incoming SMTP > mail" with > Routing restrictions enabled. However, this box is setup to > route my domain > inbound. > > The routing works as anticipated. However, I can still > "dupe" my return > address. I want to create a mechanism that also checks the > validity of the > sender prior to delivery. > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Archives: http://www.swynk.com/sitesearch/search.asp > To unsubscribe: mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] > _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
