Mojave 10.14.6 connection to Spectrum webmail

My money says it is along these lines...

Many eMail providers now require a separate App Password different from your eMail password…

Then you may need Ways to securely access AOL Mail…

https://help.aol.com/articles/allow-apps-that-use-less-secure-sign-in

Or it may just need an App Password...

https://support.google.com/mail/answer/185833?hl=en-GB

Yahoo has gone to this too...

https://help.yahoo.com/kb/access-yahoo-mail-third-party-apps-sln15241.html

Yahoo App password…

Generate and manage third-party app passwords

Some older, third-party email apps (that do not use our Yahoo branded sign in page) require you to enter a single password for login credentials. To access your Yahoo Mail account on these apps, you'll need to generate and use an app password. An app password is a long, randomly generated code that gives a non-Yahoo app permission to access your Yahoo account. You’ll only need to provide this code once to sign in to your third-party email app.

https://help.yahoo.com/kb/access-yahoo-mail-third-party-apps-sln15241.html

Using app passwords with apps that don't support two-step verification (microsoft.com)

jjdkc wrote:

Cannot connect Spectrum/Charter email to Mail on my MacBook Air

Spectrum is not providing any Mac / Apple support of any kind???

I suggest you use the webmail interface, which I know works. AFTer logging in to Spectrum.net with my spectrum username and password, I see this.

If you click on Email it then takes you to your email in a webmail interface. No second password is required.

If instead you want to set up Apple Mail, Spectrum provides this guidance:

https://www.spectrum.net/support/internet/spectrum-email-server-settings

On the same page there is chat support, you can "chat" with a person there for technical support.

You can also phone them. https://www.spectrum.net/contact-us/ You can speak with a person there for technical support also.