I know that this answer has already been resolved, but I wanted to offer a fix for other email clients who have problems with data detectors, Gmail and Windows 10 Mail.
In Gmail, this phone number gets a blue backlight and changes to blue, even with an Apple Data detector installed. In addition, Windows 10 Mail places a black dashed line under the word Monday:
800-422-4234 Monday through Friday, 8 am to 9 pm Eastern Time.
I added ‌ , non-printable character in the number 800 and in the word Monday. I put ‌ between Mo , because Mon Windows 10 Mail recognizes Mon as the abbreviation for Monday and emphasizes Mon.
800-422-42‌34 Mo‌nday through Friday, 8 am to 9 pm Eastern Time.
This fixes data discovery using Gmail and fixes the Monday issue in Windows 10 Mail, but then underlines the word Friday . So I did the same:
800-422-42‌34 Mo‌nday through Fr‌iday, 8 am to 9 pm Eastern Time.
This fixes the data discovery issue in all the major email clients I tested. Here's how I use Apple Data Discovery:
<style> [x-apple-data-detectors] { color: inherit !important; text-decoration: none !important; font-size: inherit !important; font-family: inherit !important; font-weight: inherit !important; line-height: inherit !important; } </style>
I hope this helps other people face data discovery issues with phone numbers and dates.
Good luck.
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