SMTP settings for the apps you run
When an app's built-in email stops sending, it usually needs an SMTP server. These guides give you the Ackuna relay settings for each app: the exact setting names, where they go, and how to send a test email.
The settings every guide uses
- Host
smtp.ackuna.com- Port
587- Security
STARTTLS (not SSL/TLS on connect)- Authentication
Yes, PLAIN or LOGIN- Username
YOUR_SMTP_USERNAME (starts with smtp_)- Password
YOUR_SMTP_PASSWORD (starts with sc_, shown once)- From address
any address on your verified domain, e.g. [email protected]
Port 587 with STARTTLS is the only port the relay offers. You need an Ackuna account, a verified sending domain and an SMTP credential for it; the Free plan includes 3,000 relay emails a month and 100 a day. Create a free account.
Supabase
Hosted Auth SMTP settings and the self-hosted GOTRUE_SMTP_* variables, for sign-up, magic link and reset emails.
Open the guide -> SMTPGhost
The mail block in config.production.json, or the same settings as environment variables, for staff and member emails.
Open the guide -> SMTPNextcloud
Administration settings, Basic settings, Email server, or the mail_smtp* keys in config.php.
Open the guide -> SMTPn8n
An SMTP credential for the Send Email node, and the N8N_SMTP_* variables for invitations and password resets.
Open the guide -> SMTPWordPress
The Other SMTP mailer in WP Mail SMTP or FluentSMTP, so wp_mail() sends through an authenticated relay.
Open the guide -> SMTPDiscourse
The DISCOURSE_SMTP_* variables in containers/app.yml, then a rebuild and a test email from the admin panel.
Open the guide -> SMTPMastodon
The SMTP_* variables in .env.production for confirmation, password reset and notification emails.
Open the guide -> SMTPGitea and Forgejo
The [mailer] section of app.ini, shared by Gitea and Forgejo, and the test email in Site Administration.
Open the guide -> SMTPGrafana
The [smtp] section of grafana.ini or the GF_SMTP_* variables, for alert notifications and invites.
Open the guide -> SMTPKeycloak
Realm settings, Email tab: verification, password reset and login emails for every realm.
Open the guide ->How these guides are written
Every setting name, file path and encryption option on these pages was checked against the app's own current documentation, which each guide links as its source with the date it was read. Where an app's documentation does not describe something, such as a test button, the guide says so instead of guessing.
Mail that the relay accepts but that lands in spam usually points at DNS. The free email tools check the SPF, DKIM and DMARC records of your domain in a few seconds, without an account.
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