Hello, in principal all of the S/MIME features work great. One problem I have though, is, that some email clients including thunderbird do not verify the OTRS email signature correctly. Other email clients like sylpheed and alpine show them as correctly verfied signatures. Is this a known problem? Can I fix that by changing the setup somehow? Does anybody else have the same problem? With customers' email clients complaining about invalid OTRS email signatures although they _are_ valid, my guess is, it's better not to sign at all, which is not the idea of S/MIME, either. :-(( Any thoughts, hints? Cheers Jan -- MAX-PLANCK-INSTITUT fuer Radioastronomie Jan Behrend - Rechenzentrum ---------------------------------------- Auf dem Huegel 69, D-53121 Bonn Tel: +49 (228) 525 359, Fax: +49 (228) 525 229 jbehrend@mpifr-bonn.mpg.de http://www.mpifr-bonn.mpg.de