Q: iOS10 Mail - can't open emails

Tap Settings > Mail > Accounts > Fetch New Data then toggle Push OFF then back ON.

I have the exact same problem, and I also have an email address with an apostrophe.  Toggling push off/on didn't work for me either, unfortunately.  Any suggestions?

Also have this issue, also have an apostrophe in my email accounts

Tanks mm_,

I also have an apostrophe in my email account.

I removed the account and now my other accounts are readable.

We're also having this problem with one of our employees, and he has an apostrophe in his email address. Hopefully a fix for this will be available soon...

Same problem. Same temp solution. Unfortunately it is my email address by my best customer and rerouting is not possible. I hope there is a fix very soon.

PUSH - temp fix ... still getting CANNOT GET EMAIL

Forgot to write, that the fix did not work for me.

spent an hour with apple support today - same problem - apostrophe in one email and none in the other.  remove the one that has the apostrophe and the other one then functions fine.  problem is that Apple will not admit it's an issue, so who knows when a fix is in store.  Not great being unable to check work email on my work phone.

It is due to the apostrophe in your email address.  The only workaround is to 1) forward emails from your original account to a non apostrophe email address or 2) change your account in Exchange or etc to an email with no apostrophe.

Apple is aware and will fix in 10.1 

The only workaround I've found for someone with this problem is to turn off "Organize by Thread" in the mail settings.

Just been called (In the Netherlands, from Texas) by an Apple service person. Together we made several test, created log files and send them over, made screen dumps etc. More then 1 hour en 15 minutes working together to analyse the problem.

I am impressed that they take this approach. I know again why I have so many Apple products.

I hope it helps to solve this strange obscure problem.