sendmail - dns lookup problem
I have sendmail installed on several servers of different customers.
When I run sendmailconfig on some server I get message:
WARNING: local host name (;; connection timed out; no servers could be
reached) is not qualified; see cf/README: WHO AM I?
As we can see there in brackets is an error message instead of true
local host name. This message is returned from dns lookup procedure. But
dns lookup has no problem (responses are pretty fast):
server.example.com has address 10.22.19.126
126.96.36.199.in-addr.arpa domain name pointer server.example.com
host -t mx example.com
example.com mail is handled by 10 server.example.com.
That error message appears in some lines in sendmail.cf too:
Dj;; connection timed out; no servers could be reached
Cw;; connection timed out; no servers could be reached
CG;; connection timed out; no servers could be reached
I must repair sendmail.cf myself "by hands", but Debian has "helpful"
feature - after reboot is sendmail.cf autogenerated with those error
messages inside again.
Why sendmailconfig cannot see true server name?
Thank you very much