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Optionally, you can configure an SMTP server to send transactional emails. These are used for password resets, user invitations, and more.
  • PHOENIX_SMTP_HOSTNAME: The SMTP hostname to use for sending password reset emails.
  • PHOENIX_SMTP_PORT: The SMTP port. Defaults to 587.
  • PHOENIX_SMTP_USERNAME: The SMTP username.
  • PHOENIX_SMTP_PASSWORD: The SMTP password.
  • PHOENIX_SMTP_MAIL_FROM: The from address in the emails. Defaults to noreply@arize.com.
  • PHOENIX_SMTP_VALIDATE_CERTS: Whether to validate the SMTP server’s certificate. Defaults to true.
Example usage: 
export PHOENIX_SMTP_HOSTNAME="smtp.example.com"
export PHOENIX_SMTP_PORT=587
export PHOENIX_SMTP_USERNAME="phoenix-user"
export PHOENIX_SMTP_PASSWORD="yourpassword"
export PHOENIX_SMTP_MAIL_FROM="noreply@yourdomain.com"
export PHOENIX_SMTP_VALIDATE_CERTS=true
These settings are required for password reset flows when authentication is enabled in Phoenix.

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FAQ

  • It is recommended to use a reputable SMTP service for transactional emails to ensure delivery and prevent abuse. If you do not have a preferred service from your cloud provider, consider providers like Resend, Mailgun, Sendgrid, or Postmark, which are easy to set up and offer generous free tiers.