Can I put html tags anywhere in my posts?
No. You can not use HTML tags in any field except body of the message. The maintainer of the script has the option of allowing or disallowing any HTML in the Message part of your posting. If they disallow it, the script will just throw out everything in <>'s. If they allow it, your html markup will appear in the posting. It can't hurt to try.
Why are there greater than signs '>' in the message when I try to post a followup?
Greater than signs '>' appear in the message dialog box when you try to followup up on a message to indicate that those lines are quoting the previous document. The webboard editor can decide whether they wish to enable or disable the quoting of previous messages.
Your post most likely did not show up, because unkind people have spammed this board and finally I had to shut it down.
Advertisements will probably be removed, sorry.