> Listserv postings that are digitally signed do not appear in my web archive.
> Has this problem been reported or solved?

Signed with what, S/MIME or PGP?  They appear in our archives, but you
can't verify the signature, of course.

We've seen a problem with Exchange S/MIME signatures being rendered
invalid when posted to a LISTSERV list.  Using Translate=No in the list
header solves most of the problem.  Exchange puts tabs in the MIME
headers and without Translate=NO, LISTSERV changes them to spaces.
There's also some other, les frequently occuring problem that we
haven't figured out yet.