Before STARTTLS was introduced, some clients and servers wrapped IMAP in SSL on port 993. We recommend using STARTTLS, but also support the wrapping approach.
The most common reason to use
port 993 is to ensure that
only encrypted mail access is possible. Archiveopteryx provides a
better way to ensure that, namely the
covers all mail access, not just IMAP.
In case of questions, please write to email@example.com.
Last modified: 2010-11-19