I am having two different issues. One how do I get the snow leo. mac osx 10.6. Then I am having the same problem with Imail nothing to do with addresses, things just will not go out. So I am using all the other email s.  anything you can suggest. Also the I pad is doing funny things. The typing is out of sync and also it will just in mid sentence drop down into another line.
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First issue: To acquire Snow Leopard, the easiest thing to do is to purchase it for $29 at the Apple Store, Best Buy or on Amazon.com. It is not available as a download. It must be purchased on a DVD.

With the mail not sending, it sounds like there may be a problem with your outgoing mail server settings. Since you have many email addresses it is a problem more easily handled in person.

Last issue: One possibility could be that your hand is physically making contact with the iPad screen therefore causing the cursor placement to jump to a different area. If you feel this is not the case, then you may want to restart your iPad by holding both the home button and the sleep button up top until you see the red slider. Slide it then after the iPad goes off you can hold the sleep button up top to start it back up again.