I had the same issue and was advised to change my ring tone. It solved the problem. After a couple of weeks, I was able to go back to my original ringtone.

Hey!  Thanks so much!  It worked.  So nice to have the help!

Can you answer my question??

What happens when you try to add the account back?

Try Mail/Preferences/Accounts /Account Information. Select an account, then go to Outgoing Mail Server (SMTP). From the drop down menu select Edit SMPT server list. See if the account is listed there. If so, delete the SMTP server for the account. Try to add the Mail account again.

To purchase a project open the project and click on the Buy [product] icon in the upper right of the screen

LN

Whilst I appreciate that it shows as connected, my advice remains the same: follow the instructions in the support article linked in my previous reply, if necessary including unpairing and re-pairing your Apple Watch.

Disk Utility for macOS Sierra: Erase a volume using Disk Utility

Hi

Go to apps store download Battery life it will test your battery condition.

Make an appointment at Apple store.

Or contact Support.apple.com.

Cheers

Brian

Also I am updated to iOS 10.25.0.0

We were all correct, you, ckuan, and me. I back pedalled by re-installing my previous version El Capitan V10.11.5, and my Safari reversed to V9.1.1. That indicated this Safari version to be part of the OS installation.

I then upgraded again to OS X V10.11.6, which also included Safari V9.1.2, part of OS installation.

At this stage I had never seen a separate offer on the App Store for a Safari update, and a search did not come up with any result either.

I then installed the security upgrade 2018-001 for El Capitan (there are several security upgrades by that number for other systems). After that installation, the separate Safari upgrade for V11.0.3 showed up in the App Store. I installed it to bring my system up todate.

Thanks for all your input.