However if you were to send an email to a non-iCloud account, well you’d be out of luck, and emails sent to an iCloud from another service such as Gmail or Yahoo, it would be the same. Well the good news is that Apple has since announced that they will start encrypting emails across the board
This change in tune is apparently due to an NPR article that detailed the security of major email services. According to the article, “Apple encrypts e-mail from its customers to iCloud. However, Apple is one of the few global email providers based in the U.S. that is not encrypting any of its customers’ email in transit between providers. After we published, the company told us this would soon change. This affects users of me.com and mac.com email addresses.”
According to Google’s data protection transparency website, it shows how only inbound emails were encrypted, while outbound emails to iCloud addresses weren’t. What this means is that Apple will need to work with service providers like Google/Yahoo to ensure that outgoing emails to iCloud accounts will be encrypted as well.