To reply to a posting just click on the thread to display all postings in the thread, or click on the Show Thread button if you are looking at a search results screen.

Once you've done this you will see a Reply button at the top of each posting within a thread. Click on Reply and you are presented with a page identical to the New Thread page.

There is one additional checkbox; ``I want to send this message to every participant in this thread". Select this option to make sure everyone who has participated in the thread is updated when new information is available.

This prompts an email message to every user who has posted to the thread. The email will include the text of the new posting and the URL for the posting.