Send yourself a crypto email (sign or enc, smime or openpgp).
Forward this email as attachment (without crypto) to yourself and sign the message.
Receive the forwarded email. GpgOL verified the signature.
-> Problem: GpgOL can't decrypt/verify the forwarded crypto message. If opening
the attachment "gpgol004.eml" Outlook Express starts. (-> no GpgOL crypto
functionality)
Tested with GpgOL 1.0.0 + Oultook2003SP3 + WinXPSP3.