Can't access email via POP or IMAP

Can't access email via POP or IMAP

Trying for the first time to access via POP or IMAP and I can't connect. I've gone to settings and enabled POP/IMAP access. I checked user name, password and ports over and over again and they seem to be correct but I keep getting vague messages about can't connect and to check my settings. I am trying in both Thunderbird on my PC and an app on my phone. Is there something wrong or am I missing something?