Hello, has anybody got a reliable source or knowledge about which mail clients - especially which Thunderbird release - should be capable of verifying such mails correctly? this openssl smime -verify -CAfile trusted.crt -in mail.eml successfully verifies such an e-Mail; Thanks, Walter -- Best regards, Ing. Walter H?hlhubmer -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 5971 bytes Desc: S/MIME Cryptographic Signature URL: <http://mta.openssl.org/pipermail/openssl-users/attachments/20150626/5ba8f87f/attachment-0001.bin>