Integration
Send Supabase Auth Emails with NoticeAPI SMTP
Supabase Auth can send branded transactional email through an SMTP provider. NoticeAPI gives that setup an SMTP relay on port 465, API-key auth, verified sender domains, logs, suppressions, and the same delivery visibility as REST sends.
Host: smtp.noticeapi.com Port: 465 Secure: true Username: noticeapi Password: ntc_xxxxxxxxxxxxxxxxxxxx Sender email: [email protected] Sender name: Acme
SMTP relay settings
Use smtp.noticeapi.com on port 465 with implicit TLS and your ntc_ key as the password.
Verified sender domain
Production auth email sends from domains you verify with NoticeAPI DNS records.
Auth email visibility
Verification, magic link, and password reset sends appear in logs and delivery timelines.
Delivery outcomes
Signed webhooks can send bounce and delivery results back into your own operational workflow.
How it works
From test send to production traffic.
Verify a sending domain
Add and verify the domain you want Supabase Auth email to come from.
Create an API key
Use a NoticeAPI key as the SMTP password in Supabase settings.
Configure SMTP
Set host, port 465, secure mode, sender name, sender email, and credentials.
Send an auth test
Trigger a verification, reset, or magic link email and inspect the NoticeAPI log trail.
Trust
Supabase Auth email is transactional
Auth email is for verification, login, and account recovery. Sending product updates to Supabase users still requires consent-based broadcasts and unsubscribe handling.
Implementation links
Build with the shipped docs.
FAQ
Questions developers ask before switching email.
Does NoticeAPI manage Supabase users?
No. Supabase owns authentication and user state. NoticeAPI relays the email and records delivery outcomes.
Which SMTP port should I use?
Use port 465 with implicit TLS and your NoticeAPI API key as the password.
Can I use the same account for broadcasts?
Yes, but broadcasts should use NoticeAPI audiences and unsubscribe handling, not the Supabase Auth SMTP path.
Test free. Send production from $5.
The free workspace covers simulator testing. Starter includes 3,000 production emails per month, a 100/day production cap, and one verified sending domain.