Contact Form on Windows Azure I’m having some trouble getting a contact form to submit and function correctly. The live instance of the site is on Windows Azure but my staging and local versions are unix. Is there any reason for Pixel &amp; Tonic's Contact Form plugin not to function because of the platform? Perhaps it's a lower level issue with PHP setup or my Craft configuration on Windows.

Any help much appreciated.
No, there's no reason why Contact Form would fail on Windows Azure specifically.

If I had to guess, I bet you've got your email settings "Protocol" configured to use PHP Mail. That particular method of handling email is notoriously unreliable, which would explain why it's working on some of your servers but not others.

I'd highly recommend switching to an SMTP service. I've personally had a very good experience with Mailgun, and I've heard others rave about SparkPost. Regardless of which service you choose, SMTP is far superior to PHP mail.

I'd also suggest reading the full Craft article on Troubleshooting Email Errors...