Isolate email reputation in Amazon SES Mail Manager with tenant management

This article explains how to isolate email reputation per tenant in Amazon SES Mail Manager, preventing one misconfigured sender from damaging the entire account's sending reputation.

• Amazon SES tenant management isolates reputation metrics, bounces, and complaints per tenant within a single account
• Pattern 1: SMTP sender sets X-SES-TENANT header before Mail Manager ingress endpoint
• Pattern 2: Mail Manager adds static tenant header via Add header rule action
• Pattern 3: Mail Manager derives tenant from rule conditions (source IP, sender attributes) supporting up to 39 tenants per rule set
• Pattern 4: Mail Manager invokes Lambda for runtime tenant resolution via database lookup or policy service
• Pattern 5: Mail Manager stages to S3, Lambda delivers asynchronously with full event-driven architecture
• Secure tenant attribution using IAM ses:TenantName condition key to enforce tenant boundaries
• Paused tenants fail with rejection errors while other tenants continue delivering normally

Choose the pattern matching your workload: static endpoints for legacy senders, rule conditions for stable attributes, or Lambda for runtime logic requiring database lookups or content inspection.