|I don't use Hotmail, but I know that many web based email apps have a feature known as "whitelisting" where you can manually add emails addresses and domains that should be allowed.|
For example, I had to add *.hotmail.com to my settings to allowed Hotmail originated emails through.
Whatever your email address ends with, try whitelisting *.whatever.whatever in your Hotmail settings then send an email to yourself and see if it gets through.
If this works, then everyone you send emails to on Hotmail would need to do the same thing.
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