mail server configuration using postfix on Cent OS 7

In this video you will be learn, how to create mail server without DNS configuration and how to install postfix or telnet form repository.
Using terminal I used below commands:
cd
yum
yum repolist
mount
systemctl
vim

[naseembasha]

Walaikum Assalam bro thanks for sharing such an informative video Jazakallah Khair

[configureworldbd]

How to upgrade windows 7 to 10 in 32 bit ...?
On the other hand, how do I upgrade my window 32 bit to 64 bit ..!

Can you explain or please make a short vedio .

[belovedpeace]

Pls can this localhost ip when ssh used in sending mail through any mail sender like 1st Mass Mailer and gammadyne?