GnuPG signature check failed on dovecot_1.1.13-2~bpo50+0.1_amd64.changes gpg: Signature made Sun Apr 26 20:29:40 2009 CEST using DSA key ID A535B753 gpg: Can't check signature: public key not found (Exit status 2) dovecot_1.1.13-2~bpo50+0.1_amd64.changes has bad PGP/GnuPG signature! Removing dovecot_1.1.13-2~bpo50+0.1_amd64.changes, but keeping its associated files for now. Greetings, Your Debian queue daemon