On Sunday, April 2, 2017 10:03 PM, Joseph Tam <jtam.h...@gmail.com> wrote: >As a wild ass guess, I think maybe the client is using used "STARTTLS"
>intead of "SSL", or some other SSL requirement disagreement. I believe it has more to do with the encryption method (plain, login, cram-md5) than with the TLS. The TLS encryption happens on the network layer whereas the encryption method is used at the IMAP level. -- Yassine.
