[Emailcore] Ticket #15: G.7.9. Discussion of 'blind' copies and RCPT

[Alexey Melnikov <[e-mail]>]

Dear collegues,

The 1st pagaraph of Section 7.2 ("Blind" Copies) currently says:

   Addresses that do not appear in the message header section may appear
   in the RCPT commands to an SMTP server for a number of reasons. The
   two most common involve the use of a mailing address as a "list
   exploder" (a single address that resolves into multiple addresses)
   and the appearance of "blind copies". Especially when more than one
   RCPT command is present, and in order to avoid defeating some of the
   purpose of these mechanisms, SMTP clients and servers SHOULD NOT copy
   the full set of RCPT command arguments into the header section,
   either as part of trace header fields or as informational or private-
   extension header fields.

Suggested replacement for the last sentence quoted above (as per 
feedback from Arnt Gulbrandsen):

   When more than one
   RCPT command is present, and in order to avoid defeating some of the
   purpose of these mechanisms, SMTP clients and servers SHOULD NOT copy
   any of RCPT command arguments into the header section,
   either as part of trace header fields or as informational or private-
   extension header fields.

(This removes "especially" and replaces "the full set of" with "any" -- 
copying the first one can be as harmful as copying all of them, at least 
without verifying that the addresses do appear in the headers.)

Please provide feedback on this proposal within 2 weeks.

Best Regards,

Alexey