Mailtrain combines list management, templates, and campaign scheduling. Security should prioritize admin access controls, queue worker isolation, and safe outbound SMTP usage.
¶ 1) Lock down admin and campaign controls
- Restrict admin and campaign-editor privileges.
- Disable open registration for non-public deployments.
- Enforce strong password policy and session expiration.
- Audit who can create campaigns and edit sender identities.
¶ 2) Secure workers, queue, and database
- Keep DB/Redis/internal worker ports private.
- Run worker processes with least privilege.
- Protect import/export endpoints for subscriber data.
- Encrypt backups for subscriber lists and campaign history.
¶ 3) Protect mail pipeline and webhooks
- Use authenticated SMTP with TLS.
- Restrict and validate bounce/feedback webhook endpoints.
- Monitor send volume and bounce rates for abuse indicators.
- Enforce domain authentication (SPF, DKIM, DMARC).
- Mailtrain project site/docs: https://mailtrain.org/
- Mailtrain source repository: https://github.com/Mailtrain-org/mailtrain
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