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How to Fix Emails Bouncing When You Send to Outlook.com and Hotmail Addresses

Disclosure: TheTechHacker has no paid relationship with Microsoft or any email provider mentioned here. You send an invoice and it bounces back, then a quote bounces too, and when you look closer the customers involved all have @outlook.com, @hotmail.com or @live.com addresses. Meanwhile your Gmail and company-domain contacts are getting your mail without any trouble.…