How to add a user to postfix?

Question

postfix

Hello everyone, I created and configured postfix with davecot, everything seems to be working:

Dec 20 10:31:32 mailer dovecot: master: Warning: Killed with signal 15 (by pid=8470 uid=0 code=kill)
Dec 20 10:33:03 mailer dovecot: master: Dovecot v2.3.7.2 (3c910f64b) starting up for imap, pop3, imap, lmtp, pop3 (core dumps disabled)
Dec 20 10:36:26 mailer dovecot: master: Warning: SIGHUP received - reloading configuration
Dec 20 10:38:18 mailer postfix/postfix-script[8513]: stopping the Postfix mail system
Dec 20 10:38:18 mailer postfix/master[8282]: terminating on signal 15
Dec 20 10:38:24 mailer postfix/postfix-script[9155]: warning: symlink leaves directory: /etc/postfix/./makedefs.out
Dec 20 10:38:24 mailer postfix/postfix-script[9320]: starting the Postfix mail system
Dec 20 10:38:24 mailer postfix/master[9322]: daemon started -- version 3.4.13, configuration /etc/postfix
Dec 20 10:38:29 mailer dovecot: master: Warning: Killed with signal 15 (by pid=9328 uid=0 code=kill)
Dec 20 10:40:01 mailer dovecot: master: Dovecot v2.3.7.2 (3c910f64b) starting up for imap, pop3, lmtp, imap, lmtp, pop3 (core dumps disabled)

Configured mx record and record of the domain. Checked everything on https://mxtoolbox.com
How can I test sending and receiving emails?
How can a user be created?
Can I send messages to other servers like gmail?

Answer 1

Can I send messages to other servers like gmail?

you can of course
https://www.digitalocean.com/community/tutorials/h...