Ever since 7.0.1466 installed, the SMTP portion of the mail shield isn’t communicating properly anymore with my ISP’s secure smtp server that’s requiring startTLS to be issued prior to accepting my mail.
I tried both of the available servers (secure and insecure), but the only thing that worked so far is to disable scanning the outgoing mail.
several times, reinstalled, used the removal software, reboot as requested.
whatever it is, it also influences IMAP, since I now disabled both in- and outgoing scanning and ultimately the whole module to get my mails.