When the form is displayed and someone signs up for the newsletter, it should direct them back to the site, but instead it directs them back to an old domain that doesn't exist anymore. I need it to direct them back to the site where they signed up. Thanks for any help.
On most form-driven plugins, there is a dialogue box for what to do after the form is submitted. Depending on which plugin you are using these boxes are found in different places. For example, if you are using Gravity Forms, you'd look under Confirmations.
Which plugin are you using? With a bit more information we can probably give you more details.
Hope this helps,