Unless you are using TLSv1.2 or higher, you **will not** be able to talk
to MS365. This was what they put into effect last month, and is a hard
retirement.
You need to define your version to be TLSv1.2 for the client and/or
server connectivity. Microsoft even made this announcement six months
before they deprecated TLSv1 and TLSv1.1. Try setting your version to
TLSv1.2 and see if it works now.
Thomas
On 10/26/21 11:33, Ben Bazian via stunnel-users wrote:
sslVersion = TLSv1
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