Hi
I merged all your threads to one, so we do have a better overview and not that much short threads from one person 
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Did you noticed this post here, before you created the topics? Please read this, before you start!
For all cases, you provided us way to less informations - about sending smtp: How do you connect, do you have any error in your log, is your exim up and ready for connections? You can expand this points to every thread you wrote.
If you provide us enough informations, aswell as the steps you did already in the time you tried to resolve your issue, we’ll probaly be able to help you out. With the current one sentence topics we can’t help you, our cristal ball is currently in maintenance .