E-mail attachments constitute a surprisingly large and even
unwieldy subject.  The first clarification is to distinguish
emission of e-mail with attachments, from its reception and
interpretation.  The Wiki page on the [mime] package focuses
mostly on the latter.

The variety of ways to transmit e-mail attachments with Tcl is
large.  [CL] keeps a few models in
[http://starbase.neosoft.com/~claird/comp.unix.programmer/attachments.html#Tcl].

One of the reasons for active interest in the range of possibilities
is typical for Tcl:  one wants to compensate for various constraints.
mime had severe flaws before [tcllib] 0.8 (and still has other
errors--more on that, later)
and is essentially unreliable with Tcl before 8.2.
CL frequently needs to set up quick e-mail operations on hosts
equipped with old interpreters; 7.6, for example, in the case
of a client met in January 2002.  For older interpreters, it's
best to enlist outside help, as with

    set tmpfile /tmp/abc[pid]
    set subject "This is the subject line."

    exec /usr/local/bin/mpack -s $subject -o $tmpfile $standard_name
    set To {The distribution list}
    set recipients "first@host.com second@somewhere.com nemo@sea.org"
    set recipients [join $recipients ,]
    exec $sendmail -t << \
    "To: ($To)
    Bcc: $recipients
    [exec cat $tmpfile]"







----
Mutt:  Someone had contributed a mutt example that was not correct
(mutt tossed back a "bad usage" message).  CL's taken the liberty
of simplifying the example from four lines to one, in the process
of correcting it:
    exec mutt -s $subject -a $attachment $to << $body
 
----
Other useful external Unix utilities include pine and uuencode
[[give examples]].
   



----
FP: Another useful Unix utility for this job is UUDeview
[http://www.fpx.de/fp/Software/UUDeview/]

    uuenview -b -m nemo@sea.org -s "The Subject" filename