We have in place an email verification system. That means that you will have to respond to an automatic email sent to you after you subscribe. This is an attempt to prevent invalid email addresses from being entered into the system and have to subsequently be manually removed. It also prevents someone from signing up other people who aren't really interested. If you are unable to figure out how to send in the needed reply, use the feedback form link at the bottom of the page to send a message and we'll help you.
In case it's still not clear, here's a quick test you can do to see if you're viewing something with a monospaced font: Write two lines of 10 characters, one of 'w's and one of 'i's, like this:
wwwwwwwwww
iiiiiiiiii
If they're the same length (they are not here) then you're in a monospaced font. Here's what it looks like in one:
wwwwwwwwww
iiiiiiiiii