# Custom email provider
## 1. Configure the provider
Dashboard > Branding > Email Provider. Options: SendGrid, SES, Mailgun, Mandrill, SparkPost, or custom SMTP. Fill in credentials and the from address. Verify the domain (SPF/DKIM) at your DNS; without it, verification and reset emails land in spam and your login funnel silently leaks.
## 2. Templates
Branding > Email Templates: verification email, welcome, password reset, blocked account, MFA enrollment. Each supports Liquid syntax for variables (`user.email`, `application.name`). Customize:
- From name users recognize (your product, not "Auth0").
- Subject lines that survive spam filters (no ALL CAPS, no excessive links).
- The blocked-account template MUST be clear: it is the self-serve unblock path.
## 3. Test
Send test emails from the dashboard. Then do a real signup in incognito and time the verification email arrival. Over a minute consistently means provider or DNS issues.
## 4. Monitor
Watch the provider's bounce/suppression lists. One hard bounce suppresses that address; users then report "never got the email" and resends do nothing until the suppression is cleared.
## Checklist
- Custom provider + verified domain before launch.
- Every template a user can receive has been read by a human on your team.