Can I change server name for imap and smpt

Help me…

Now I’m successfully running mail server. I’m follow this tutorial

But I’m not happy with the servername, because this is not my main domain.

Is it possible to change servername…? example if we already setup mail server with imap : and change to…?

Please help me…

Thank you…

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Yes, it is possible to change the name, first rename your droplet, then inside your droplet modify /etc/hostname and restart network or restart your droplet.

As I don’t know what OS Distro are you using this procedure can change, so be sure to google hot to rename hostname on your distro,

Finally successfully change mail server name by running reconfiguration

sudo dpkg-reconfigure postfix

Thank you for your answer, I use ubuntu Ubuntu 14.04,

Now, my email client (thunderbird) only can connect with my mail server with this setting

Incoming Imap Servername: Port: 993 SSL: SSL/TLS Authentication: Normal Password

Outgoing SMTP: Servername: Port: 587 Authentication: Normal Password

What I want change servername for Incoming IMAP and Outgoing SMTP. I want to change to other domain.