This has been working fine for months, but this week when I hit the Send Message button I receive the following error message:
Your message was not sent. Either the email service is not available or one of the recipients may have an unknown email address.
I get the error even when attempting to send it only to my own email address, which I know is valid. If I remove the HTML and put in plain text then it sends the email successfully. This leads me to believe that there's something blocking HTML content now (either intentionally or unintentionally).
Does anyone know anything about this? Did something change? Is it blocking HTML intentionally? Anyone else also experiencing this?