I set ARCHIVEDIR to capture everything being delivered. The captured data file has the original MIME boundaries in place, and when copied to a maildir has a perfectly readable attachment.
Check whether the original message has trailing CRs. If so, it means that when the message was originally received via SMTP, lines were terminated with CRCRLF, instead of CRLF. Garbage in, garbage out.
pgp00000.pgp
Description: PGP signature
