If you're setting up your own cold email infrastructure, you'll need to warm up your IP address. But Microsoft/Outlook will make it a pain. Little thread on how to do it 🧵
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1. Your IP will initially be blocked with: "550 5.7.1 Unfortunately, messages from [IP] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140)." Don't fret.
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2. Not surprisingly, Hotmail's own SNDS tool will show zero historical data for the IP. Their support, however, claimed emails from our IP had been reported as unwanted, which is false.
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3. Canned responses: Insiders believe that Hotmail support staff are restricted to canned responses, which can make navigating these issues even more challenging.
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4. Reaching out to Hotmail support through olcsupport-dot-office-dot-com is a must. Just be prepared for the process to take time and require persistence, but in the end you'll end up with the this result.
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