Outlook 2007 suddenly stopped sending POP3 mail via Outlook.com. Error message is: "Your server does not support the connection encryption type you have specified."
--Sending was set to 587/TSL. Changing to 465/SSL didn't help. Also tried "auto" & "none" on both ports. Same error.
--Very short messages & simple messages [no graphics], & some forwards, are sent instantly. Longer/graphic messages invariably fail.
--Moved server timeout to 1.5 minutes. No help.
--Unchecked "server requires encrypted connection." No help.
--Unchecked "outgoing server requires authentication." No help.
--Inbound port is 995 encrypted. [Have also tried 110 unencrypted.]
>>>I have 10 other POP3 accounts using the same Outlook inbox, & all work fine.
Problem onset MAY have been coincident with a bunch of MS updates last week, but I can't be sure [I've tried uninstalling a few; no success].
I'm running Win 7 Pro.
All help welcome except suggestions that I switch to IMAP. Thanks.