CentOS 3.6 Qmail slow response

[boonsiong]

I do a local telnet to port 25 on my machine, but the response is slow, takes about 10second,
Other port like pop3 service and SSH service response very fast, any idea?

My OS is CentOS 3.6 and Plesk 7.5.4

 

[eilko]

probably a DNS-timeout. Check http://kb.swsoft.com/article_22_298_en.html

 

[boonsiong]

thank you.
my problem solved.