Hi

Starttls (STLS) is not working with pop3.

There is a bug in current implementation.

Current implementation sends STLS just after opening connection.

As result connection hangs (pop3.el tries to read a greeting message
after STLS, but all POP3 servers I tried does not send anything after
successful negotiation). On other hand, ignoring server greeting leads
to mistreating server greeting (+OK <timestamp>) as successful response
to STLS command. In this case negotiation starts too early (before
reading real response to STLS).

I've attached a patch which fixes the problem. The server greeting got
read first (as with plain POP3) and only after receiving greeting STLS
issued and TLS negotiation starts.

I hope much this would be fixed in next minor release of emacs.

Thanks!