Hi,
  since two days none of my friends seem to be able to send emails to my hotmail accounts anymore. They get the error code 550 SC-001

I know that this seems to be some sort of a Microsoft policy that checks 3rd party email hosts more thoroughly.

But hey! It can't be that suddenly all my previous email-writers suddenly get that message ! What is wrong here ?

Please, any help appreciated :)

Sincerely,
  Skuenstler

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