This moodle forum does not allow Yahoo email addresses when registering. So I had to use my company email. I can see a reason for this, to avoid 'spam', but because I subscribe to forum discussions my company email inbox is flooded with forum messages, which is a problem when I travel and check email on a mobile phone or other mobile device.
For this reason I use my Yahoo email when subscribing to foirums and discussion groups - it lets me deal with direct work issues that require immediate attention on my company email, and look at discussions that are interesting but not urgent using the Yahoo email.
Unfortunately the decision in this forum to not allow Yahoo addresses means I am stuck with a flooded email inbox or have to unsubscrbe (which I don't really want to do, but will have to).
Wouldn't it be reasonable to allow Yahoo email addresses? I subscribe to a lot of specialised discussion groups and none disallow Yahoo addresses.