Undeliverable email sent to friend. Message comes back to me undeliverable all of a sudden. Have had no problems in the past. Using @icloud.com
All of a sudden mail is being returned to be as undeliverable. The message contains info why it was returned, but I cannot figure out what it’s saying.
I’m thinking that some how the recipients have blocked me unknowingly? How can they tell if I am blocked on their Spectrum account ?
iPad, iPadOS 14