[TIP] Trouble shooting port 25 smtp in LINUX

Troubleshooting Linux e-mail issues.

netstat :

netstat -a | more
shows all listening ports of tcp and udp connections

netstat -at
shows all listening ports connected

netstat -plnt | grep ‘:25’
ss :

ss -lntu | grep ‘:25’
nmap :

nmap -sT -O localhost | grep 25
lsof:

lsof -i:25

telnet myserver.com 25

epic
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Contributer and Author Enterprise Communications Engineer Hi Epic

testest test 

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