I decided to go onto a VPN
(https://www.privateinternetaccess.com, $40. per year) because it
encrypts and anonymizes your internet activity. Given all the
criminal, business and governmental snooping, it's probably more
than a good idea.
The VPN setup was dead simple, but my outgoing email to the TWC/Charter/Spectrum/whoknows SMTP mail server wouldn't send.... I suppose because the email now came from the anonymized address outside the TWC network.
And anyway, my down and upload wasn't authenticated, so I wanted that and TWC has finally, finally got that. And I was hoping for encrypted SSL. There are, alas, elventy-leven different possible combinations so it wasn't easy figuring out what works. TWC's support was utterly useless and parroting a very simple trouble-shooting script.
Note that whether or not you have a VPN, it's worth securing your
email login, download and upload
One annoyance of what I finally came up with was that I could no longer hide my email redirection alias. I have my own domain, sdean.net, and email sent to my address of email@example.com gets redirected to whatever actual email provider I use...like my actual email account of firstname.lastname@example.org. Besides being easier to remember and tell people, if I change providers or the provider changes its name (RoadRunner RR.com became twc.com and who knows what next), people never have to change what they have for my email address.
With things as they are now, email@example.com still works, but it's more obvious to people that that's the real destination....and that may confuse some people. Oh well.
Anyway,. these are the Account Settings for both email down and
up load with authentication, and which will work with my VPN. The
email address and username incoming and outgoing appear to be
required to be identical. The password, submitted elsewhere, is your TWC account password
For the incoming mail. Note that the User Name is NOT just the
user name, but the whole email address
For outgoing mail.
If you use TWC this should give you a starting point for authenticated and maybe encrypted mail even if you don't use the Thunderbird mail client on your machine, because the parameters will be somewhat similar.