I've got a couple of email forwarder questions regarding forwarding addresses I've setup on my account via the CPanel interface.
I have some forward addresses sending mail to a gmail address of mine. Gmail has a feature where you can append +[string] to the email address so you can in theory tell where the email came from. So I had been appending the +[string] to my forwarders to know which forwarder would be sending it. However, it appears CPanel no longer allows the "+" character as a valid char in the email address so I can no longer create an email like email@example.com. This is fine, but I can also no longer delete forwarders with the +[string] in them either. My question is, is there another way I can modify these addresses?
Second, I've noticed that if I run the "Trace" function on a forwarded address it will display my forwarder address as well as the email that it is forwarding the email to. The question here is what is the "Trace" function doing? Is this looking at the MX Records to determine the route? Is this something that a spammer could possibly "tap into" to see what email address the forwarder eventually routes messages to?