You would need a paid-for Microsoft email account to get this to work
systemctl stop postfix
dnf install postfix s-nail cyrus-sasl-plain
Insert the following at the end of the /etc/postfix/main.cf file
smtp_tls_security_level = may meta_directory = /etc/postfix shlib_directory = /usr/lib64/postfix smtpd_tls_security_level = may smtpd_tls_auth_only = yes smtpd_sasl_auth_enable = yes smtpd_sasl_path = smtpd smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_tls_security_options = noanonymous smtp_use_tls = yes relayhost = [smtp.office365.com]:587 smtp_sasl_auth_enable = yes smtpd_relay_restrictions = ${{$compatibility_level} < {1} ? {} : {permit_mynetworks permit_sasl_authenticated defer_unauth_destination}} mynetworks_style = host myorigin = sitename.com
Create the credentials file in /etc/postfix/sasl_passwd: vim /etc/postfix/sasl_passwd
vim /etc/postfix/sasl_passwd
use the following data: [smtp.office365.com]:587 user@sitename.com:password
[smtp.office365.com]:587 user@sitename.com:password
change the user to your user and password to your outlook password for that account in the information above
create the postmap file: postmap /etc/postfix/sasl_passwd
postmap /etc/postfix/sasl_passwd
change permissions on the files:
chmod 600 /etc/postfix/sasl_passwd
chmod 600 /etc/postfix/sasl_passwd.db
You can test this in the command shell: echo "Test body" | mail -s "Relay Test Email" kwjamie2@gmail.com
echo "Test body" | mail -s "Relay Test Email" kwjamie2@gmail.com
# Add ports permanently (retained after reboot)
firewall-cmd --permanent --add-port=25/tcp
firewall-cmd --permanent --add-port=587/tcp
firewall-cmd --permanent --add-port=465/tcp
firewall-cmd --permanent --add-port=143/tcp
firewall-cmd --permanent --add-port=993/tcp
firewall-cmd --permanent --add-port=110/tcp
firewall-cmd --permanent --add-port=995/tcp
# Reload firewalld to apply changes
firewall-cmd --reload
