E-mail should be nearly instaneous!
I get very frustrated with sites that take more than five (5) minutes to send you items like your lost username, password, and software licenses (if they do it this way). When you ask for these items from websites, you are ON their site at that time, so you should receive it, then! I can be seen clicking on my
(send/receive) icon for my e-mail client to get the latest, greatest e-mails. I’ve been waiting, now, for four (4) minutes after landing on a page that states “License Codes Sent!”. I was sent to the developer’s website from the application, too! Come on, folks! If your web script can find my credentials in miliseconds, and the response is to tell me the code I want has been sent, you can make sure it was sent!