Getting a lot of these today...
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<zorak.fishergroup.local #5.7.1 smtp;550 5.7.1 Service unavailable; Client host [188.8.131.52] blocked using Blocklist 1, mail from IP banned; To request removal from this list please forward this message to firstname.lastname@example.org
and include your ip address 184.108.40.206 .>
Since I made the DNS PTR record change, MS is blocking some of my clients from receiving mail from this IP.
The response I got from MS:
"Thank you for your delisting request SRX1189751617ID. Your ticket was received on (Dec 07 2012 03:30 PM UTC) and will be responded to within 24 hours.
Our team will investigate the IP address that you have requested to be removed from our blocklist. If for any reason we are not able to remove your IP address, one of our technical support representatives will respond to you with additional information.
Anyone else having issues with this? It is really annoying...