Mark Constable writes:
A related followup. This looks like the actual MS patch that caused my particular problem with Outlook users not being able to connect via SSL after a recent MS update. For some reason I had an old 768 bit dhparams.pem file and this link clearly states that MS will now only accept a minimum of 1024 bit DH keys...https://technet.microsoft.com/library/security/MS15-055 So *maybe* it's nothing to do with SSL3 but I'm not game enough to put SSL3 back on a busy server just to test this out.
The problem with MS-ware is when it refuses to negotiate TLS, rather than provide an informative message referencing the relevant details, it comes back with some content-free gibberish about "unable to establish a connection", or something along these lines.
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