[sylpheed:37247] Re: Syhpheed 3.7.0 fails to connect to MS Exchange

I wrote:

> After I upgraded my Sylpheed from 3.5.0 to 3.7.0 my local
> Microsoft Exchange account stopped working:
>
>    * creating IMAP4 connection to ex-07.###.##:993 ...
>    ** LibSylph-WARNING: SSL_connect() failed with error 5, ret = 0 (error:00000000:lib(0):func(0):reason(0))
>
>    ** LibSylph-WARNING: [12:44:18] Can't establish IMAP4 session with: ex-07.###.##:993
>
>    ** Can't establish IMAP4 session with: ex-07.###.##:993
>    ** LibSylph-WARNING: [12:44:18] Could not establish IMAP connection.
>
>    ** Could not establish IMAP connection.

For the Evolution e-mail client, a similar problem was
solved by specifying a TLS encryption algorithm[1]:

  G_TLS_GNUTLS_PRIORITY=NORMAL:+3DES-CBC

Is something similar possible with Sylpheed on Windows?
____________________
1. https://gitlab.gnome.org/GNOME/evolution/-/issues/516#note_548870