So live.com are limiting the number of email you can actually send to their servers. I am guessing the reputation is from their users marking your mails as spam. But I have to guess as Microsoft do not publish their rules or their reasons. Either that or their definition of a mail server is wrong as the IP address looks like a standard residential IP address, not a server.

Thanks for the response. Would the IP reputation relate to my website host? I have taken this issue to Bluehost who have tried to improve their IP reputation by issuing certificates?? This makes me believe the issue lies with them. As they have not been able to solve the problem I have with my emails I have to look at ending my contract with them.

Arrowfield1,

Yes, the "IP reputation" relates to your mail host's mail servers. I've seen similar problems in the past between one of my own mail providers and a specific recipient because of SPAMmers using their servers to send out SPAM mail. They got added to some blacklists. In the end, I solved it by getting my mail provider to initiate the process of clearing things with the recipient mail provider that was rejecting their mail. I had to search to find out what the specific recipient provider's process was for resolving such things. They had a web page set up just for that.

So you should try to find help on live.com's website, to see if they have automated tools set up to try to clear up such problems. "S3113" is probably an error code you can use to help narrow your search.

In fact, the bounce text you provided has a URL! Follow that <https://postmaster.live.com>. It redirected me me to <https://sendersupport.olc.protection.outlook.com/pm/> and of the three links in the middle of that short page, the second two look relevant to your situation. Use the error code "S3113" to see if you can help yourself from there.

Good luck, and have a blessed day!

Thank you very much C.V for your detailed response. I will be taking this to my IP provider to resolve. Paul