Did you ever receive a pop-up error on your iPhone saying “Cannot Verify Server Identity,” often mentioning “The identity of some-random-domain.com cannot be verified“? I encountered this issue recently, and it can be quite bothersome. Interestingly, it doesn’t always show up but pops up from time to time.
This problem typically arises when one or more services on your phone attempt to connect to an internet service that’s either no longer active or isn’t secure. Often, this involves subscription calendars or a mail sevice that have expired.
The good news, however, is that this issue is relatively straightforward to fix.
How to Solve It?
Pay attention to the message stating “The identity of some-random-domain.com cannot be verified.” If you recognize the domain as belonging to a calendar you subscribed to, you’ll need to delete that calendar.
On the other hand, if it’s related to a mail app, you should delete that email account and consider re-adding it later.
Go to Settings > Calendar.
Then, under "Subscribed Calendars", delete the one from the domain mentioned in the error message.
2. Mail App
If the previous steps don’t resolve the issue, it might not be the calendar but your Mail app. In that case, do the following:
- Reboot your phone. (See how)
- Close the Mail app.
- Delete your email account and re-add it.