From: Stuart Henderson <stu@spacehopper.org>
Subject: Re: openssl: implement -starttls sieve for s_client
To: Martijn van Duren <openbsd+tech@list.imperialat.at>
Cc: tech@openbsd.org
Date: Fri, 30 Jan 2026 10:10:27 +0000

On 2026/01/30 10:44, Martijn van Duren wrote:
> Hello tech@,
> 
> I had to do some sieve debugging, and wrote this snippet to allow me to
> connect. Is this worth having? Sieve STARTTLS is defined in RFC5804
> section 2.2.

I think it makes sense, as does doing it this way with a separate if
block (it's somewhat similar to IMAP, but different enough that the
conditionals would make it hard to read if done as one block with
variations).

OpenSSL already has this, and also irc ldap mysql nntp postgres telnet
xmpp-server, in addition to the ones we both have: ftp imap lmtp pop3
xmpp smtp. (even the non-text-based protocols are useful to have for
checking certificates, if not for actual protocol debugging).

FWIW ok sthen.