Hi guys,
I'm already desperate to solve this issue... For some reason my clients who are using hotmail.com or outlook.com stopped getting my emails that are sent by my server. These are important emails regarding sales. I'm getting an error:
Unfortunately, messages from [My server IP] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140). My ISP doesn't have anything to do with my server.
I don't send more that a dozen of email per day. My server IP isn't blacklisted when I check with mxtoolbox.
I have a Microsoft account and I'm logged in, but I can't submit a support request. How is that possible??? I'm paying for Microsoft products, I have a registered account, but I can't submit a support request.
I found numerous similar topics on Microsoft support forums and I don't see anyone to have solved this issue. This is terrible.
Any help is greatly appreciated.