I've found that the emails I send from my application have their links (whether normal link or button) 'stripped' by Hotmail. Other email providers I've tested like Gmail are fine though. E.g. code like the below...
<a href="mydomain/book_request"><b>Book</b></a>
... results in Hotmail showing the following text:
[mydomain/book_request]Book
The same happens with buttons that contain links
What is the right HTML/CSS to use?
Thanks a lot