Why won’t I get emails sent to my iphone?

Start here:--> If you can’t send or receive emails on your iPhone, iPad or iPod touch – Apple Support

Regards

Giulio

i recently changed phones ( from iPhone 5 to 8) and now I don't receive my icloud email.

I can see it at icloud.com but not on my phone. I have set up and receive gmail.

cant get e-mail from comcast (recent development) on ipad