Done all these things many times and it seems to work for a while without problem and then problems receiving mail again.
It's fine that reset network settings seems to fix issues like this, but how often should you have to do this. DAILY!!!
I'm also every so often getting 'Cannot get mail' ' connection to server failed' message when I open the mail app.
I've found this on the internet by other people and have done all the typical things. Reset network settings , change password, move mail into separate folder, etc.etc.etc.
I don't know if this is an ios problem, outlook.com, my ISP, or combo of some or all.
Very frustrating!!!
I'm thinking more Apple because reset network settings does fix for a time, probably the most reliable fix I've found, though very short lived.
Like I said before, to get consistent on time email, do you really have to reset network settings every day!!!
Thanks for your time
Dan