my email doesn’t work on computer but does on my phone. Why what changed
Not sure what you mean by "my email doesn't work on computer"; that's a very vague statement.
Are you able to get to webmail?
If so, are you able to open an email and read it/reply to it if necessary?
Are you able to compose an email?
What browser are you using?
If you answer no to any of those questions, be tell us what happens when you try.