# Connect to the Zivver SMTP Gateway

Connect the mail server or Secure Email Gateway (SEG) of your organization to the Zivver SMTP Gateway. Use these specifications:

- **Smart host:** smtp.zivver.com.
- **Port:** 587 (preferred) or 25.
- **Security:** TLS 1.2 (or higher) with STARTTLS.
- **Authentication:**
  - **SMTP credentials:**
    - A Zivver admin generates a username and password for this.
    - If the mail server or SEG requires an email address as a username, extend the generated UUID by adding `@smtp.zivver.com`.
  - **SPF is implemented for outbound messages:**
    - Anonymous connection as no credentials are used.
    - smtp.zivver.com checks if SPF passes when a message is submitted.
    - The domain in the From header is checked to see if it is allowed to submit messages.
- There must be an **active** Zivver account for the sender’s email address (From:).
- The Zivver DNS settings are implemented so that Zivver can send messages on behalf of the domain(s) that your organization uses to send messages from.

Updated on 2025-11-20