How to check server speed

You can check the server speed by using the following command

mii-tool

cant send email due to csf

solutions:

change the following settings in /etc/csf/csf.conf

=======
SMTP_BLOCK = "0"
SMTP_ALLOWLOCAL = "0"
======

PS: smtp block should be 1
allow local should be 1
else someone may use our server to relay

Also we can solve this problem by enabling smtp tweak via whm