email account monterey

First, I'm running Monterey 12.0.1 on a MacBook Pro, using Mail 15.0, and have Spectrum as my ISP. Spectrum won't answer questions if you have Apple hardware, and I can't find any email settings for Mail on a MacBook Pro when I search their website. Need your help.

The problem: I have gmail addresses that can receive email but cannot send. At any hour, I'll suddenly get an email error message that the server doesn't recognize my email address. Sometimes it fixes itself.

I also have one email address where it's a GoDaddy server. On that one, I haven't been able to send messages for months, but I can receive them. They also blame it on Apple.

My comcast.net emails always work.

I need to find the Mail pane where I can click or unclick SSL, where I can put in my password and where I can set the server settings. Please don't say contact Spectrum. They have iPhone and iPad info but not for Mail running on a MacBook Pro laptop.

I used to navigate to the right pane this way: Mail > Preferences > Accounts > Server Settings. Now, there is nothing under Server Settings except Outgoing Mail Account with my email address in there.

When I go to "Edit SMTP Server List" the selected email address is NOT there at all.

Any help gratefully appreciated. One thing I don't want to do is remove and add back the email account because I have emails going back to 2007 and do not want to recreate my file structure on those.

TIA.