Callout not working?

Lets write a bit more about how to get a callout to work and to make debugging available. I already wrote something about this before in this post: Callout debug: Access is Denied.So your callout is not fired? Here are some thoughts to get started. Make sure that:- the callout even should fire. Are you using the right callout? Special attention to the email PreSend and PostDeliver callouts: