Mail does not accept my email

I tried another emal-app. Now I installed Mail again. It does not accep my email any more

Everything is correct, also passwords etc. It works with other apps, but not with Mail. Even if I delete other apps..

iPad Pro Wi-Fi + Cellular
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howapple - hello

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Hi, oysvesa,

I noticed that you haven't gotten a response to your post yet. If you could answer the following questions, it might help others in the Apple Support Communities get you to a solution:
  1. What happens when you try to add your email to Mail--do you get an error message? Does it act like it signed you in, but not let you send or receive emails?
    1a. If you do get any errors, what are they?
  2. Is this happening on your iPhone, or iPad? What iOS version is it running (found under Settings > General > About > Version).

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