Hi Rob, Without seeing further info my first guess is the sending MTA is forcing an encryption protocol (like SSLv3) which your endpoint doesn't support.
Ken. -- Ken O'Driscoll / We Monitor Email t: +353 1 254 9400 | w: www.wemonitoremail.com On Thu, 2017-01-05 at 20:51 +1100, Robert Mueller wrote: > We've suddenly had a couple of reports from users about people sending > to them (e.g. sending from a remote service to our servers) failing and > bouncing with the error message: > > Certificate rejected over TLS. (unknown protocol) [...snip...] _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
