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Depends on whether or not your email provider requires it. If you can't get it working, you may not be able to send/receive mail. I'd contact the email provider (whether it be a public email, work email, school email, etc.).
 
I can't seem to make SSL work for my Mail - is it important?

Is it crucial? No. Maybe for some. If your just sending a casual email to a friend then its not really that important IMO :)

However if your a business man, sending important and private information to colleagues high up, you might want it on. ;)
 
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