R-P.Net
  E-mail Aliases
 
I can provide an e-mail address for you with
  the domain name r-p.net. These addresses are really aliases for an existing
  account that you have. What my domain server does is to simply forward the
  message to your account. It allows you to have what I think is a
  "neat" address. It will be permanent, assuming that I maintain the
  domain name and that MY provider continues to give this service.
If you accept this offer and then want to
  have your e-mail system show the new @r-p.net address appear as the return
  address on your outgoing messages, you will need to change your
  "identity" in the browser. In Netscape you
  edit>preferences>mail>identity and change the e-mail address. Make
  sure you are not changing the server info, but only identity.
If you are using Hotmail or other network based
  e-mail system, the only way to show the r-p.net return address seems to be to
  use a signature block that contains (without any spaces): mailto:yourname@r-p.net.  When clicked, this brings up your e-mail
  composer.  Unfortunately, the reply
  field in your outgoing message will still show the e-mail account associated
  with the actual machine you are using.
You can continue to use your actual address
  if you wish even when the alias exists.