What’s the advantage of on-premise logs?

On-premise logging keeps all email transaction records on your own infrastructure. This provides advantages over relying solely on ESP-hosted logs.

Complete data access:

• Every field, every transaction, unlimited queries
• No API rate limits or access restrictions
• Raw SMTP transcripts if needed
• Data in formats you control

Custom retention:

• Keep logs as long as you need (ESPs often have limits)
• Compliance requirements met your way
• Historical analysis without data expiration concerns

Integration flexibility:

• Feed into your own analytics systems
• Correlate with application logs, CRM data, other systems
• Custom alerting and monitoring
• Whatever analysis tools you prefer

Independence:

• Not affected by ESP policy changes
• Data survives ESP migration
• No vendor access to your detailed logs

Compliance and security:

• Data stays in your security perimeter
• Full audit trail under your control
• Meet data residency requirements
• Implement your own access controls

Tradeoffs:

• Storage costs and management
• Need infrastructure for log processing
• Must build your own analysis tools or integrate commercial ones
• Responsibility for retention, backup, security