Admin Console (Port 2087) Email Accounts Tab 5: SMTP Relay
BoostonCP SMTP Relay Tab

Email Management • Tab 5: SMTP Relay • Native 1920x1080 View

📌 Purpose & Quick Summary

Use the SMTP Relay tab to route all outgoing emails from your domain through trusted enterprise email delivery networks (such as Brevo, SendGrid, Amazon SES, or custom SMTP servers). This bypasses dirty VPS IP reputations and ensures 100% inbox deliverability directly to Gmail, Microsoft Outlook, and Yahoo.

🖥️ Interface Tour & Elements

  1. Target Domain Selector: Select which domain will use the relay.
  2. Enable SMTP Relay Switch: An on/off toggle that activates or deactivates relay routing for that domain.
  3. Provider Selection Cards:
    • Brevo (Sendinblue): Integrated with automated 1-click credential sync.
    • SMTP2GO & Custom SMTP: Manual entry cards.
  4. Relay Credentials Form:
    • SMTP Host, Port (587 or 465), Username/API User, and Password/API Key.
  5. API Smart Sync Section: Allows pasting your provider's API key to automatically fetch and configure SMTP credentials with 1 click.

🛠️ Step-by-Step Instructions: Configuring Brevo SMTP Relay

  1. Select your target domain from the Target Domain for Relay dropdown.
  2. Switch the Enable SMTP Relay toggle to ON.
  3. Under Select & Activate Relay Provider, click Activate on the Brevo card.
  4. In the fields below:
    • SMTP Host: smtp-relay.brevo.com (Pre-filled).
    • Port: 587.
    • Username: Your Brevo login email address.
    • Password / API Key: Your Brevo SMTP Master Key.
  5. Alternatively, open the API Automation section, paste your Brevo v3 API key, and click Sync Credentials. BoostonCP will automatically query Brevo, generate SMTP credentials, and inject them into Postfix.
  6. Click Save Relay Settings. BoostonCP immediately updates /etc/postfix/sasl_passwd and reloads Postfix.