Huh? – Canon warranty and promo stupidity

I recently purchased a camera and then emailed the scanned warranty card together with the invoice to their email address as indicated on the card.  I got a reply from them that included this note:

To register the 3-year warranty, kindly visit our website at www.canon.com.ph and click the  Promo Redemption Portal.  By the way, the PS G12 comes with a 2Gb iPod Shuffle.  The said items can be redeemed by also registering online.  You may also click the link below:

http://goto.canon.com.ph/redemptions/Digital_IXUS_1000_HS_210_Touch_300_HS.aspx

Please note that the email address only accept yahoo or hotmail and the maximum size to upload the sales invoice is 500kb only.  By the way, please do not use slash (/) or dash (-) in the form to prevent error and the serial number it must be digits only.

Do they have an exclusive tie-up with Yahoo or Hotmail that we can’t use a different domain?