How to receive e-mail on a server with CentOs 5?

Question

Iron

I am setting up a server on CentOs 5. According to the tutorial wiki.centos.org/HowTos/postfix installed postfix and dovecot. They work. Configured the user's Mailbox directory. And POP3 works, I can check mail.
However, sending mail to the server does not work. I suspect that you need to open port 25.
telnet myserver.com 25 says nothing (cannot connect).
If yes, how to do it?

Answer 1

www.uderzo.it/main_products/space_sniffer/download.html - to help you. Just run as administrator.

Answer 2

https://www.jam-software.com/treesize_free/ - you will see everything clearly ... :)
By the way, SSD has one feature (I will support the previous author) - it is NOT RECOMMENDED to give the entire capacity to the partition ... On the Internet, you can find a technique for bullying the SSD! Verdict: it is recommended to leave 10% to 20% in the unallocated area...

Answer 3

Show the output of the commands:

iptables-save
netstat -ntpua | grep 25

Answer 4

by default, postfic only happens to the local ip 127.0.0.1
, you need to set it in the config to listen to the external ip of the server
, and open port 25 in the firewall