We moved to another location and got a new ip from ISP and our exchange server is not able to send emails to some recipients getting .mail.protection.outlook.com error.
user@domain.com
BN1AFFO11FD036.mail.protection.outlook.com #550 5.7.1 Service unavailable; Client host [72.76.xxx.xx] blocked using Blocklist 1; To request removal from this list please forward this message todelist@messaging.microsoft.com ##
This is the error I am getting and I did email to delist@messaging.microsoft.com and I am wondering when will my IP get unblocked as this is causing a lot of communication issues. I checked my ip for blacklist but its not in any database. Hope I'll be able to find some solution soon on this.