nnimap-stream

nnimap-stream is a variable defined in `nnimap.el'.
Its value is

undecided

Documentation:
How nnimap talks to the IMAP server.
The value should be either `undecided', `ssl' or `tls',
`network', `starttls', `plain', or `shell'.

If the value is `undecided', nnimap tries `ssl' first, then falls
back on `network'.

This is a Gnus server variable. See Info node `(gnus)Select Methods'.