Anti-Spam Reverse DNS Testing
Alexander Zammit has been developing server applications for over 15 years. Most of his works involve Exchange integrated applications, including a FAX server, a mail security product and anti-spam products.
- Published: Oct 26, 2010
- Votes: 4.3 out of 5 - 6 Votes
Reverse DNS (rDNS) queries are very often employed to identify email servers that are incorrectly configured. Failing such a test, results in many emails being rejected. Today we discuss how to setup DNS in order for our email servers to pass this test.