iPhone cannot verify server identity

Hi guys

So real problem is when you have more than just on e-mail account on the server where you are getting cert issues.

Scenario

I have a more than one hundred mailboxes on the server wich recently updated its ssl cert.

Delete all of them and reconfigure again is not an option and Apple don't bother with their customers to much to fix old bug in their IOS so I tried this steps.

How I fix the problem.

1. Pick one from affected accounts and delete related SMTP server before you will delete that account.

2. Disable but not delete all accounts which are affected by ssl cert issues.

3. Readd account which you just delete and confirm trust to it by clicking details option from pop up window.

4. Enable all your previously disabled accounts.

DONE

This fix will works if you have mailboxes which are using the same outgoing SMTP server.

Hope the Apple will address this issues in their next IOS updates but unfortunately I'm getting more upset everyday with their everyday support.

Hope this help

Cheers,

Dear brothers and sisters,...

This is most likely due to the fact that you messed with Date & Time settings and set Automate to OFF.....
Did you scramble with these settings and rewinded your iphone clock??...

I did this and the Google & iCloud server connections stopped.

Switching the Date & Time settings to Automate solved it for me.

Still occurring. Today the server SSL cerificate was reissued and my iPhone began to repeatedly and annoyingly give this warning. Yet, the Details show the certificate ‘Not trusted’, but with a valid date one year from today. A contradiction!

This following worked to fix this issue for me:

1. Settings > Accounts & Passwords > problem account > Account > Advanced > (incoming settings) Authentication

(Password was checked)

2. Change to NTLM

3. Navigate back until Done is visible. Press Done

4. Previous step immediately threw another alert. (server does not support NTLM) Press OK.

5. Navigate again to Authentication (#1 above) and change back to the original value. (Password)

6. Navigate back until Done is visible. Press Done (no error alert)

7. Switch to Mail and noticed the account was now able to check for mail with no error.

This is soooooo dumb. My mail account was working fine. Every month or so Let's encrypt updates my SSL Cert and usually you can just accept the change "cannot verify" -> click continue.

But now there is NO continue button and you can do no actions in the details. Apple could you fix this please as I simply cant use my phone for email now...

Yeah, blowing away the account doesn't solve it. I suspect this is a 10.1.1 bug.

Same problem. Started as soon as I updated.

I had this problem too. I was able to solve it when I changed in Settings/Mail../ Default Account from iCloud to one I had problem with..

I had this problem and I solved it by going into Settings, Mail, Accounts, selecting the problem account, Advanced, and then unchecking "Use SSL" in "incoming settings".

I had this problem and I solved it by going into:

- Settings

- Mail

- Accounts

- Select the problem account

- Advanced

- then uncheck "Use SSL" in "incoming settings"

I had this problem and I solved it by going into:

- Settings

- Mail

- Accounts

- Select the problem account

- Tap on "Advanced"

- Then uncheck "Use SSL" in "incoming settings".

You're awesome!

This finally resolved the problem.

I also have this problem. Tried the above and no difference.

Similar issue.

Recent upgrade to iOS 10.1.1 AND my domain email provider updated their SSL certificate 11/25 - and BOOM. No-go for the account.

Correction. Started with iOS 10.1.1 upgrade.

What you can do is launch Safari and navigate to the https url of the server address.

Doesn't work if the email server is not running an SSL web server...