When you send an email from the web, the recipient receives an email that might look something like this:
firstname.lastname@example.org when in fact the email address is: email@example.com
The reason it looks like this is because the mail providers often do a reverse lookup to determine whether the email that was sent from rapidfunnel.us came from a server that they expect to send rapidfunnel.us email.
We send emails on behalf of our users. If we did not change the address, the email would look like it came from gmail.com. With reverse lookup, the mail providers would check to see if we owned Google's email servers (we do not) and that information may cause them to think we are sending SPAM. Delivery rates are improved by configuring the address and adding rapidfunnel.us.
When the prospect hits 'Reply', the reply goes directly to your actual address.
Note: If the prospect tries to save the user's address from the main mail app, they might need to edit the address by removing the rapidfunnel.us.