I realise it's the opposite of what you are asking, but I still wanted to take the opportunity to mention that there are many advantages with plaintext emails:

I realise it's the opposite of what you are asking, but I still wanted to take the opportunity to mention that there are many advantages with plaintext emails: https://useplaintext.email https://useplaintext.email. It's okay to allow those who want to use beautiful (I assume it means HTML) emails, but you should always include a plaintext version (it's easy) for those who don't want to/can't read HTML emails.