🚀 go-pugleaf

We're running 5.61++ IDA sendmail ($Header: READ_ME_UK,v 1.5 89/08/18 12:30:15)
and have encountered a problem with header rewriting, especially of "From:"
and "Reply-To:" lines.

There seems to be no problem with lines of the form
        From: Malcolm.Harper@uk.ac.oxford.prg (Malcolm Harper (Postmaster))
but lines of the form
        From: Malcolm.Harper@uk.ac.oxford.prg (Malcolm Harper \(Postmaster\))
get mangled into
        From: Malcolm.Harper@prg(.oxford.ac.uk (Malcolm Harper \(Postmaster\))
and then fail with "Unbalanced '('".

As far as I can tell, our system does not add the "\" characters before the
inner brackets, but we are receiving frequent "From:" lines of this form from
various mailing lists (such as cellular-automata, help-gnu-emacs, infovax and 
xpert).

The addresses are sometimes mangled into
        From: user@machine(:university:edu (Forename Surname \(comment\))
but that may be through subsequent mangling by the (UK-2.1 configured)
sendmail rewrite rules.

Has anyone else seen this problem?

-- Malcolm Harper