Looking at the comments here you should remember who the people here are (hackers) and who your audience is. If your audience is hackers the advice here is goo

Looking at the comments here you should remember who the people here are (hackers) and who your audience is. If your audience is hackers the advice here is good, if it isn't you should probably look elsewhere to back up the your choice. For most people the only distinction between HTML and plain text emails is that the plain text email looks boring and doesn't have clickable links, meaning that you can't click through to a webpage. Copy-pasting a link is still for the geeks.