what would be considered a secure email account?
I use Startmail. An account costs about $60/year.
They don’t data-mine your account. I.e. they make their money from providing the email account and not from selling your private information.
You can also have multiple email alias.
Finally they have encrypted email services where you can send and control an email you send to someone. (i.e. they can respond to your email but not forward it).
Of course they can always take a picture of the email!
for receivign emails only- mailinator.com- totally temporary- and no sign up needed- when you need to give a site an addy- just type soemthign you will remember, like “Bobsyeruncle@mailinator.com” Then simply go to mailinator.com and type bobsyeruncle in the search bar- and htere’s the email- easy peasy
They delete after a certain number of hours- and you can manually delete too if you need to get rid of say something like login info for new site-