Integrations · Send-through
Clerk
Deliver Clerk authentication emails — sign-in links, verification codes, invitations — from your own verified domain through Deckle.
Clerk supports a custom SMTP provider for its authentication emails. Point it at Deckle so every auth email routes through your verified domain on AWS SES with full delivery and open tracking.
Set it up#
Connect Clerk in Deckle
Open Integrations → Clerk and click Connect. Copy the secret key Deckle shows once.
Add a custom SMTP provider in Clerk
In the Clerk dashboard, go to Customization → Email and choose a custom SMTP provider.
Paste the connection settings
| Setting | Value |
|---|---|
| Host | smtp.getdeckle.com |
| Port | 587 |
| Username | apikey |
| Password | Your Deckle secret key |
Verify your sender domain
Add and verify your from-domain under Domains so Clerk mail passes SPF and DKIM.
Also works for other auth stacks
The same SMTP flow powers Supabase, Auth0, Auth.js, and Better Auth — connect, paste the settings, verify your domain.