Management of multiple domains in mail server

aaP_roberto.lombardi

Good morning everyone,
I need to handle multiple emails with my aapanel server. I currently have a domain configured and in postfix it is configured in myhostname mail.projectcesare.ch. In addition to this email server, I need to manage others. How can I do it? If I try to put "myhostname = mail.projectcesare.ch, mail.famiglialombardi.ch, mail.domain1.ch, ..." postfix doesn't start. How can I manage multiple email domains?
Thanks for any ideas or suggestions

aaPanel_Kern

1.Edit main.cf file
Open the main configuration file for Postfix /etc/postfix/main.cf and add the following:
sender_dependent_default_transport_maps = hash:/etc/postfix/sender_transport

2.Configuration sender_transport file
Create a sender_transport file in the /etc/postfix directory and add the following:

@domain1.com smtp1:
@domain2.com smtp2:

3.Edit master.cf file
In /etc/postfix/master.cf , specify a different for each transport label:

smtp1     unix  -       -       n       -       -       smtp
    -o smtp_helo_name=domain1.com
    -o syslog_name=postfix-smtp1

smtp2     unix  -       -       n       -       -       smtp
    -o smtp_helo_name=domain2.com
    -o syslog_name=postfix-smtp2

4.Generating and Applying sender_transport Maps

postmap /etc/postfix/sender_transport
postfix reload