kill connections

I run netstat -a | grep smtp
and I see connections like these :


tcp        0      0 *:smtps                     *:*                         LISTEN
tcp        0      0 *:smtp                 *:*                         LISTEN
tcp        0      0 myserver:47197    spf2.us4.outblaze.com:smtp  ESTABLISHED
tcp        0      0 myserver:47194    spf2.us4.outblaze.com:smtp  ESTABLISHED
tcp        0      0 myserver:smtp     84.95.82.176.cable.012:3974 ESTABLISHED
tcp        0     30 myserver:smtp     bulk.hol.gr:41490           ESTABLISHED
tcp        0      0 myserver:46479    spf6.us4.outblaze.com:smtp  ESTABLISHED
tcp        0      0 myserver:47304    spf6.us4.outblaze.com:smtp  ESTABLISHED
tcp        0      0 myserver:47313    spf6.us4.outblaze.com:smtp  ESTABLISHED
tcp        0      0 myserver:47247    spf6.us4.outblaze.com:smtp  ESTABLISHED
tcp        0      0 myserver:47232    spf6.us4.outblaze.com:smtp  ESTABLISHED
tcp        0      0 myserver:47258    spf6.us4.outblaze.com:smtp  ESTABLISHED
tcp        0      0 myserver:47272    spf6.us4.outblaze.com:smtp  ESTABLISHED
tcp        0      0 myserver:47264    spf6.us4.outblaze.com:smtp  ESTABLISHED

I have added with iptables deny to outgoing and incoming to spf6.us4.outblaze.com
but it still connected.
how can I kill the connections ?



LVL 2
MaRiOsGRAsked:
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ravenplConnect With a Mentor Commented:
run netstat with -p option(get the pid), then kill the process which hold the connection.
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pablouruguayCommented:
in this case

service sendmail restart
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MaRiOsGRAuthor Commented:
[root@server /]# service sendmail restart
bash: service: command not found
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MaRiOsGRAuthor Commented:
I did restart the smtp (qmail) and pop3 server from the panel (plesk) many times but i still see these connections..
is there any way to kill them with some shell command ? just like we can kill a process ?
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pablouruguayCommented:
no, i guess.
The only way to close this connections is close the service or restart the server.  
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