On 30 Nov 2020, at 12:07, SysAdmin EM <[email protected]> wrote: > TLS: handshake failure Nov 30 15:29:40 smarthost04-ded
> I have read the documentation but I cannot understand why this error occurs. Because the server running thirteen year old software does not support valid encryption methods. Here is an article for 4 ½ years ago. <https://dirteam.com/dave/2016/04/11/the-end-is-nigh-for-exchange-2007/> Another potentially important tidbit is that Exchange 2007 SMTP, IMAP and POP3 do not support TLS1.1 and TLS1.2 Nothing you can do put tell them if they want encrypted mail delivery, they have to update their ancient and decrepit software. -- I went down the street to the 24-hour grocery. When I got there, the guy was locking the front door. I said, "Hey, the sign says you're open 24 hours." He said, "Yes, but not in a row." -- Steven Wright
