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--- gmail_as_a_relay_on_linux_centos8 [2022/03/18 14:28] – juckins
+++ gmail_as_a_relay_on_linux_centos8 [2022/03/18 14:32] – juckins
@@ Line 13: / Line 13: @@
     * The "Less Secure Apps" is not available in Gmail if your account is configured for 2-factor authentication
     * Everything should work OK.
+Perform the following steps as root:
+  cd /etc/postfix
+  cp main.cf main.cf.distro
+  mkdir /etc/postfix/sasl
+  cd /etc/postfix/sasl
+  vi sasl_passwd
+Add this line:
+  [smtp.gmail.com]:587 [email protected]:password
+  postmap /etc/postfix/sasl/sasl_passwd
+  chown root:root /etc/postfix/sasl/sasl_passwd /etc/postfix/sasl/sasl_passwd.db
+  chmod 0600 /etc/postfix/sasl/sasl_passwd /etc/postfix/sasl/sasl_passwd.db
+  vi /etc/postfix/main.cf
+Comment out this line:
+  #smtp_tls_security_level = may
+Now wdd to the end of the main.cf file:
+  # Local Edits
+  relayhost = [smtp.gmail.com]:587
+  # Enable SASL authentication
+  smtp_sasl_auth_enable = yes
+  # Disallow methods that allow anonymous authentication
+  smtp_sasl_security_options = noanonymous
+  # Location of sasl_passwd
+  smtp_sasl_password_maps = hash:/etc/postfix/sasl/sasl_passwd
+  # Enable STARTTLS encryption
+  smtp_tls_security_level = encrypt
+  # Location of CA certificates
+  smtp_tls_CAfile = /etc/pki/tls/certs/ca-bundle.crt
+Restart postfix:
+  systemctl restart postfix