Ubuntu 22.04
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Mail Server : Virtual Domain Setting
2022/05/17
 
Configure for Virtulal Domain to send an email with another domain name different from original domain.
This example is for the case you use OS user accounts.
For example,
present domain name ⇒ srv.world
new domain name ⇒ virtual.host
a User [ubuntu] has an email address [ubuntu.srv.world],
a User [jammy] has an email address [ubuntu.virtual.host],
the user [jammy] uses the same name for before [@] with [ubuntu].
[1] Configure Virtual Domain.
root@mail:~#
vi /etc/postfix/main.cf
# add to the end of the file

virtual_alias_domains = virtual.host
virtual_alias_maps = hash:/etc/postfix/virtual
root@mail:~#
vi /etc/postfix/virtual
# add

ubuntu@mail.virtual.host   jammy
root@mail:~#
postmap /etc/postfix/virtual

root@mail:~#
systemctl reload postfix

[2] Set new account on Email client and verify possible to send emails normally.
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