http://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=3378 --- Comment #1 from Andrej Kacian <andrej at kacian.sk> --- Have you tried the S/MIME plugin? As far as I know, .pfx are standard x509 signatures. -- You are receiving this mail because: You are the assignee for the bug.