Hi Nick > > We recently acquired some IP space, but it seems outlook does not want to > receive email from that space. > > If there's someone that knows what we need to do, we would be grateful > for any pointers in the right direction. >
First sign up for snds and get the ips under your control. This will allow you to see what state they are in https://sendersupport.olc.protection.outlook.com/snds/ Note that MS throttles all new IPs until they get a baseline on what the IP is sending, so if you have mail servers with new IPs they will take time to get up to speed. So if you have a lot of 451 errors from them this may be the cause. Then you can try and open a ticket. https://support.microsoft.com/en-us/supportrequestform/d75c9d92-a918-3a46-52bd-565a528f1b64 They will tell you to sign up for sender support, follow there guidelines for sending etc. But I have had some success with them, not always , but there are not really any alternatives that I know if. Brian
