Model & Protocol draft comments

For the benefit of those not at IETF and to give those who are an advanced
preview, here are my comments on the two drafts:

Model draft:

2. Definitions

   "The UA and MSA are often combined into the same program."
   - Add: MTA can act as an MSA

   "The final MTA is what sends any Delivery Status Notificatons (DSNs)."
   - An Intermediate can send a DSN if it relays to a non-DSN aware MTA

   "A Delivery Status Notification [RFC-DSN] is produced by an MTA when a
   message is unsuccessfully delivered, either to its next hop or the final
   message store, or when it is successfully delivered, either to a foreign
   MTA or to a local delivery agent."
   - how about when relaying to a non-DSN aware MTA

Protocol draft:

3. Message Tracking Enabling

   "make a "best effort" to record when messages are passed into other
   environments."
   - what is "best effort"?

   - What happens if tracking requested and passing to an MTA which doesn't
     support tracking?

4.2.3.	Stored Authentication Value

   - Offer use of SHA1 instead of or in addition to MD5?
     - Need to ID hash in the string

5.  Message Tracking Requests

   - Offer 250-TRACK but not allow the MTRK VERB? (i.e., only transfer
     TRACKID info)

6.1.  Message Tracking Enabling

   "S:	25o <[email protected]>	recipient ok"
   - 250 -^

6.2.  Message Tracking Request

   "C:	MTRK 1234567890123456789012:[email protected]:0
   S:	-- response to be determined"
   - Add after that:
     "C:	QUIT
      S:	221 goodbye"

7.  Security Considerations

   - Who can track?  Transfering ability to somone else?

9.  Authors' Addresses

   " Eric Allman
     Sendmail, Inc.
     street address
     city, state zip

     Phone: +1"

   - Change to:

   " Eric Allman
     Sendmail, Inc.
     6603 Shellmound Street
     Emeryville, CA 94608

     Phone: +1-510-594-5501"