Garbled email
I am receiving garbled gibberish emails from one sender. Except for email I receive from this one sender, all the other email I receive is fine. The garbled email began in January 2018. Prior to this date all this senders emails were readable. He usually sends a group email, but even his individual emails to me are garbled. Other group members receive the email just fine. If someone on the group email responds and "Replies All", then I can read the senders original email. The garbled gibberish emails begin with this header:
--_000_MWHPR19MB11179AE7DE9512B53AEF5BB0C4E70MWHPR19MB1117namp_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64.
How do I fix it??
Or is the problem on the sender's end?
I am using a iMac Desktop (late 2013) with OS High Sierra 10.13.6 and Apple Mail.
iMac, macOS High Sierra (10.13.6)
