symmetric email encryption

[Robert J. Hansen]

> I think that would be a nice feature for recipients who don't have an 
> asymmetric key (those 99%).

But given the overwhelming majority of GnuPG users have an asymmetric
key, this is ... kind of pointless.

> Is there any reason *not* to support symmetric-only encryption in a mail 
> client?

Besides, "if you already have a secure channel over which you can send a
key, why not just use that channel for your communications"?