David,
I was trying to use 'Spread the Word' to let some of my friends know about Community Credit. A few of my friends, who use @rediffmail.com was writing me in reference to my followup call on whether they were able to signup. They were telling that they didn't get any note from Community-Credit inviting them.
A parallel investigation into my mailbox in close scrutiny of all folders got the following delivery failure notice:
Reporting-MTA: dns;160935-WEB1
Received-From-MTA: dns;160935-WEB1
Arrival-Date: Sat, 19 Jul 2008 06:48:58 -0500
Final-Recipient: rfc822;username@rediffmail.com
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;553 sorry, invalid HELO hostname (#5.7.1)
It looks like Community Credit handshake with Rediffmail SMTP server does not seem to be proper and hence the email is bieng bounced back.