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Knowledge base

Authentication

  • Authenticate clients using X.509 certificates
  • Implement a custom SASL authentication mechanism
  • Restrict SASL users to certain sender domains

Signing and validation

  • Signing with S/MIME
  • Signing with BATV
  • Signing with DKIM
  • Deploying DMARC

Delivery

  • Scripted routing
  • How to deliver using LMTP
  • In-line delivery
  • Outbound deliverability
  • Using HAProxy for sharing outbound IP addresses
  • Enable the DSN extensions
See all 7 articles

TLS

  • Use required TLS for inbound and outbound traffic

Logging

  • Remote logging to Elasticsearch
  • Remote syslog to Logstash

Monitoring

  • Monitoring with Prometheus
  • Monitoring with Slack

Integration

  • How to query a REST API effectively
  • cPanel
  • WHMCS

Threat protection

  • Supported anti-spam engines
  • Supported anti-virus engines

Miscellaneous

  • RFC & standards compatibility
  • High availability and load balancing
  • How to implement recipient filtering
  • Check if the sender domain exists
  • Rate limiting
  • SPF
See all 10 articles
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