==== Required information ====
- iRedMail version (check /etc/iredmail-release):
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- Related log if you're reporting an issue:
====
CentOS new iRedMail Pro mysql version
Error on sending via port 587 to the effect: An error occurred while sending mail. The mail server responded:
5.7.1 <email_address> Sender address rejected: not owned by user