qpopper question

[Michael Faurot]

Pieter J. D. Huiberts <huiberts na earthlink.net> wrote:

: I have configured linux as an email server useng sendmail and qpopper
: (POP3). All works fine! In my maillog file I find this entry from
: qpopper: Jun 2 07:35:38 mydomain qpopper[1078]: (v3.0.2) Unable to get
: canonical name of client 63.162.216.21: Unknown host (1)

: Can somebody explain me what this means, and how to take care of this?

It simply means that there is no reverse DNS listing for the IP
address 63.162.216.21.  For example:

$ nslookup 63.162.216.21
Server:  localhost
Address:  127.0.0.1

*** localhost can't find 63.162.216.21: Non-existent host/domain

In other words--it's not a problem.

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 Michael | mfaurot  | Walk softly and carry a big stick.
 Faurot  | atww.net | 		-- Theodore Roosevelt