This ticket is for implementing email notifications that
go to 
only a single user at a time rather then the muliptle users that is 
currently implemented.

It will allow the following:

  
reduce/prevent the chance of side conversations
     occuring 
that are not tracked by roundup becuse the
     actual addresses of 
other parties on the ticket are in
     the email header.

  allow 
a "remove me from this issue" link at the bottom
     of the email that 
is sent.

  Allow the addition of an inline footer showing the
    
names of the people who received this email. This
    list  can 
include people who were cc'ed by the
    original author, but are not 
nosy for the issue.
    (these cc'ed people are not shown as 
recipients
     of the message in the current roundup 
emails.)

  Another nice thing about individual emails is that 
the
    user can decide if s/he wants attachments and
    limit the 
size of attachments and emails. So if
    I say, I only want email 2K 
or less in length, I may
    get a truncated email to 2k, but at least I 
will have
    the URL to it if I need to look at the whole thing.
    Just 
add a maxnotificationmessagesize and
    
includeattachmentsinnotification fields to the
    hyperdb user 
entry.

  And many more things including curing 
baldness
     and bad breath!!.

Drawbacks:

  
somwhat increased email load since each email
     will require a 
separate transaction.

  There may be problems with the 
message ID's which
      are supposed to be unique, and each 
email IIRC
      should have a different message ID to track it
      
through the mail system. Yet we are using the
      message ID's for 
handiling threading, so we want
      the ID to be the same for all 
emails. 

-- rouilj