Re: "proper" handling of BCC

["John Levine" <johnl@xxxxxxxxx>]

>> That strikes me as a really unfortunate idea.  Submission servers know all
>> about envelopes and message headers.  In most cases, they don't know anything
>> about the body of the message beyond what they can intuit from the MIME
>> headers.
>
>As noted, this is a scenario that has been supported by some posting MSAs, like
>sendmail and mmdf, going back a very long time.  My own view is that this is,
>nonetheless, an MUA function.  That is, for this feature, sendmail and mmdf
>were/are acting as MUAs to prepare the message for formal posting, and then they
>turn into MSAs.

In case it wasn't clear, the MSA making the envelope from the headers
is reasonable, since you can write down a fairly simple rule for how
it works. The MUA is still a better place to do it since it's more
likely to know what the user wanted, and the simple rule becomes much
more complex in corner cases like multiple From: addresses and
Resent-x headers.

Having the MSA add comments into the body is much less so.

R's,
John