Bowie Bailey writes:
courieresmtpd: courieresmtpd: STARTTLS failed: DEBUG: Unexpected SSL connection shutdown.I've been seeing this message in my logs quite a bit recently. The IP addresses that it comes from (based on the previous "started" line, are all outlook.com addresses. I am having a problem getting emails from someone who is using an the outlook.com servers for his email, so I think this is related. Apparently, Outlook doesn't like something about my SSL setup. These errors and the bounceback errors I have been provided by the sender don't give any clues to the actual problem.
The actual problem is that the remote server terminated the network connection, without any further information. There's really nothing much more that can be said about it.
I have the protocol set to SSL23, which should allow everything according to the comments in the file. Any suggestions?
There's been some recent chatter that MS-ware is now requiring 2048-bit DH keys.
Run the mkdhparams script, with the DH_BITS environment variable set to 2048.
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