Setting up ptr records for mail froms Share on Facebook Post on reddit Tweet on Twitter Share on LinkedIn Home › Forums › Messaging Software › Exchange 2007 / 2010 / 2013 › Setting up ptr records for mail froms This topic has 2 replies, 3 voices, and was last updated 9 years, 6 months ago by FischFra. Viewing 1 post (of 1 total) Author Posts nukunuMember Jul 13, 2011 at 9:23 am #155462 I am having frequent 450 4.7.1 Client host rejected: cannot find your hostname to domains like yahoo, gmail and etc. We don’t have a PTR configured at the ISPs end. The ISP doesnt have the infrastructure to that yet. The fact is that, the ISP is also a new partner company. We have the ISPs bigger router on premises. How can we install a public DNS on the ISPs network to advertise the PTR records for our exchange server? Can we achieve this by using Windows Server 2008’s DNS Role?. Thanks. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.