Custom SMTP

Custom SMTP lets you send authentication emails through your own email provider instead of Sticklight’s built-in mailer.

Who can do this: Workspace Owners and Admins. Editors and Viewers cannot configure SMTP settings. See Roles and Permissions for details.

What is SMTP?

SMTP (Simple Mail Transfer Protocol) is the standard way applications send emails. When your app needs to send a signup confirmation or password reset, it connects to an SMTP server that handles the actual delivery.

Every email provider (Gmail, Outlook, your company mail server) uses SMTP behind the scenes. When you configure Custom SMTP in Sticklight, you are telling your app to route authentication emails through your chosen provider’s servers instead of Sticklight’s default system.

This gives you control over:

• The sender address your users see
• Email deliverability and inbox placement
• Sending limits and quotas
• Your domain’s email reputation

Why Use Custom SMTP?

Sticklight includes a built-in mailer for testing, but it has limitations:

• Rate-limited to approximately 2 emails per hour
• Intended for development and testing only
• Emails come from a generic Sticklight address

With Custom SMTP, your authentication emails come from your domain. Your users see [email protected] instead of a system address.