[email] Sending email from Azure

For people wanting to use the built-in .NET SmtpClient rather than the SendGrid client library (not sure if that was the OP's intent), I couldn't get it to work unless I used apikey as my username and the api key itself as the password as outlined here.

<mailSettings>
    <smtp>
        <network host="smtp.sendgrid.net" port="587" userName="apikey" password="<your key goes here>" />
    </smtp>
</mailSettings>