I am having the exact same problem!!! Were you able to find a fix? The only difference between our problems is that I have a different theme. I was using Contact form 7 and it use to work fine. It just stopped sending emails one day. No setting were changed on my end. I have since tried installing Easy WP SMTP but it did not solve my problem. I also discovered I could not change my general setting email either and got the same message as you. I too have my email through GoDaddy and have an Office 365 account.
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This reply was modified 7 years, 9 months ago by crystallea.
