What should I use for multi-region email delivery?

For multi-region email delivery, the best choice depends on whether you mean sending transactional email, receiving inbound email, or both.

Good default options

1) Amazon SES

Best if you want:

• strong multi-region support
• high deliverability
• low cost
• easy integration with AWS
• failover across regions

You can:

• provision SES in multiple regions
• configure separate identities and DKIM in each region
• route sending through the closest/healthy region
• use DNS/MX and application-level failover

2) Postmark

Best if you want:

• simple setup
• excellent deliverability
• transactional email only
• less operational complexity

Postmark is very reliable, but multi-region architecture is more limited than building your own with SES or similar.

3) SendGrid / Mailgun

Best if you want:

• a managed email platform
• API + SMTP options
• decent global support

These are common choices, but multi-region active-active setups can be more application-driven than provider-driven.

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If you need true multi-region resilience

Use:

• multiple provider regions
• DNS failover
• health checks
• regional queues
• idempotent email jobs
• one canonical message store

A common pattern is:

• App in each region queues email locally
• A regional worker sends via the local SES region
• If that region is unhealthy, fail over to another region/provider

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My recommendation

• Transactional email + multi-region + AWS: use Amazon SES
• Simplest reliable transactional email: use Postmark
• Need more general-purpose email API: use SendGrid or Mailgun

If you want, I can recommend a setup based on your exact use case:

• transactional vs marketing
• send-only vs send + receive
• AWS/GCP/Azure/on-prem
• active-active vs active-passive