Using Classic Outlook on Windows for personal email, calendar, and contact management
Dear Julie Huntsman
Good day!
Thank you for posting in Microsoft Community.
With regards to your query, I tested this on my end and found that if you use the demo version of OffHours the tag [Offhours DEMO] is added to the subject line of each message that is delayed sending, and the full product version has no limitations. Please check the notes added to the install package, this is mentioned.
Your understanding is highly appreciated.
Sincerely,
Momo | Microsoft Community.