Constant spam emails, ask me to renter password 3 times

At some point in the past couple of years I must have opened a spam email and given someone an opening to barrage me with these annoying little pests. I receive anywhere from 10 to 50 a day. When I have tried to go in and change my email password whatever this bug is will not allow me to send an email until I have entered my password in three separate times. There is a box that pops up that says cannot send email and it sends me to settings. I am beyond frustrated. I have taken my iPad to the Mac store and they say it’s impossible for that to happen. But I know otherwise.

How do I stop this request for email password 3 separate times? Right after I elect a new password, I’m able to send an email. But if I try to send an email with one of my email addresses and, I have two email addresses, I get tons of new spam emails.