Arrogant RBL list maintainers

Valdis.Kletnieks at Valdis.Kletnieks at
Wed Dec 16 07:21:16 CST 2009

On Wed, 16 Dec 2009 07:06:55 EST, Mike Lieman said:

> What's the word for 'mail server' in Lower Sorbian, and does your algorithm
> properly detect it in a hostname?  See the problem here?

When the hostname at that IP address is exactly one incremented character
different than the preceding address, and one decremented character different
than the following address, and that pattern holds across a /24, they're
probably not mail servers.  Nobody has 256 'frzzmabs-1'..'frzzzmabs-256'
servers in the same /24  for *anything* user-facing.
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