O auth is coming to Zabbix but it will be in Q2 2025. In the meantime, I would like some suggestion to work around to send email to my exchange server for now. So far, I have used the microsof 365, microsoft 365 relay and also generic SMTP server to send email to my mail server but to no avail. They are met with either login denied, connection timed out or login denied. Thank you in advance.