Hello,

>From what I've inferred from ocaml-ssl's documentation, its "read" function
has Unix-like non-blocking
semantics.

This means that read returns the number of bytes available, not the number
of bytes requested.

Hence you need an extra buffering/parsing layer on top of SSL sockets.
However you are using
IMAP, which is line-oriented, I guess Ssl.input_string should do what you
want.
-- 
Berke