Configure SMTP for outbound emails

To configure SMTP settings using an external SMTP server, you have to add the lines indicated below to the /opt/bitnami/apps/discourse/htdocs/config/discourse.conf:

smtp_address = "SMTP_HOSTNAME"
smtp_port = SMTP_PORT
smtp_domain =
smtp_user_name = 'SMTP_USER'
smtp_password = 'SMTP_PASSWORD'
smtp_enable_start_tls = true

Restart the servers:

$ sudo /opt/bitnami/ restart

SMTP configuration for Gmail

Warning: If you use Discourse extensively, we recommend to use your own SMTP server for sending emails. The current Gmail sending limit is 500 emails per 24 hours.

An example for Gmail is as follows. Replace USERNAME and PASSWORD with your Gmail account username and password respectively.

smtp_address = ""
smtp_port = 587
smtp_domain =
smtp_user_name = ''
smtp_password = 'PASSWORD'
smtp_enable_start_tls = true
authentication = plain

To configure the application to use other third-party SMTP services for outgoing email, such as SendGrid, refer to the FAQ.

NOTE: If you are using Gmail as the outbound email server and have experienced issues trying to send emails correctly, check the Gmail SMTP troubleshooting page to learn the causes of these issues and how to solve them.

Last modification January 18, 2019