Mail client Gmail not working various apps

[wakkaday]

I've installed various apps but emails aren't arriving in my inbox

Mail pilot
Mailbox
Apple mail
Airmail

It's all the same it seems to struggle to recieve emails even those I have sent directly from the client to the same address it just stores it in the sent inbox


Can anyone advise how I can fix this issue

It seems the thunderbird client works but that's looks a mess and I don't like it, a mess on a 27 inch monitor

Thank you