Apparently, for most of the time, the Exchange Server used in my office does not correctly resolve when a reverse DNS lookup is performed against it. While this has not been a particularly big problem, it is causing an occasional problem when communicating with those mail servers that perform reverse DNS lookups on connecting mail servers.
The problem is a bit more complicated since we do not own the IP address space provided to us. All of these addresses resolve to our ISP. In theory, we should be able to get it to work. I just cannot believe this problem never popped up sooner.
In any event, I will be poking around at a few things and testing the reverse DNS lookup to see if I can get this working as expected.
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Who’s your provider? Is it Qwest? They don’t provide RDNS right off the bat, but I know Covad does. Try talking to them and just asking for a PTR record.
Unless your upstream provider has delegated authority for reverse DNS on your IP allocation you need to rely on their DNS servers to correctly answer queries.
If they have delegated the authority to you well then get off you butt and fix your Exchange server or install a real DNS server.
My former and current hosting providers don’t delegate reverse authority for the IPs they have allocated but are more than happy to set up the proper reverse records for IPs.
I would hope for any business class service you are paying for they would do the same.
My guess for why this might just be cropping up is people are getting tougher on email b/c of the increased volume of spam. Every little bit (like doing a reverse lookup ) can help reduce the load on a mail server.
how do I fix that tagline problem?
I have no idea what you are talking about, but it sounds super fun. I just know how to use a computer, which puts me way ahead of everyone I work with.
mokiejovis and Paul: The provider is Verizon, and I believe they should be able to make the appropriate PTR record. From there, a quick tweak to my Exchange box and I am good to go. Nice crack, by the way, Paul.
Lori: Let me poke around and get back to you. I believe that is merely a function call as part of the template.
danielle: You may be leaps and bounds ahead of your coworkers. That says a lot given your industry of choice.
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