Regions

Choose the region where your emails are sent from to reduce latency and meet data requirements.

What are regions?

When you add a domain in SendKit, you choose a region — the geographic location of the infrastructure that sends your emails. The region determines where your email traffic originates from.

Choosing the right region can reduce latency, improve delivery speed, and help you meet data residency requirements.

Available regions

SendKit currently supports three regions:

Region	Location	Identifier
🇧🇷 South America	Sao Paulo, Brazil	sa-east-1
🇺🇸 North America	Ohio, United States	us-east-2
🇪🇺 Europe	Frankfurt, Germany	eu-central-1

How to choose a region

The best region is the one closest to your recipients. Email delivery involves multiple network hops between SendKit’s servers and the recipient’s mail server. A shorter distance means lower latency and faster delivery.

Examples:

• If most of your users are in Brazil or Latin America, choose 🇧🇷 Sao Paulo (sa-east-1)
• If most of your users are in the United States or Canada, choose 🇺🇸 United States (us-east-2)
• If most of your users are in Europe, choose 🇪🇺 Europe (eu-central-1)
• If your users are spread globally, choose the region where the majority of them are located

The region you choose affects where emails originate from, not where your account data is stored.

Setting a region

You select a region when adding a domain. This is a one-time choice — the region cannot be changed after the domain is created.

If you need to switch a domain to a different region:

1. Remove all senders associated with the domain
2. Delete the domain
3. Re-add the domain with the new region
4. Update the DNS records at your provider (they will be different)
5. Verify the domain again

Multi-region setup

If you need to send emails from multiple regions using the same root domain, use subdomains. Each subdomain can be assigned to a different region.

For example:

Subdomain	Region	Use case
us.acme.com	🇺🇸 United States (us-east-2)	Emails to North American users
br.acme.com	🇧🇷 Sao Paulo (sa-east-1)	Emails to Latin American users
eu.acme.com	🇪🇺 Europe (eu-central-1)	Emails to European users

Each subdomain operates independently with its own DNS records, verification status, and warmup schedule.

Data residency

The region controls where your email sending infrastructure is located. This means the email content passes through servers in that region before being delivered.

If your organization has data residency requirements (e.g., data must not leave a specific country or region), choose the region that meets those requirements.

Account-level data such as your team settings, API keys, and contact lists are stored independently of the sending region.

FAQ

Can I change the region of an existing domain?

No. The region is set when you add the domain and cannot be changed. You need to delete the domain and re-add it with the new region.

Does the region affect deliverability?

The region itself doesn’t affect whether emails land in the inbox or spam. However, choosing a region closer to your recipients reduces latency and can improve delivery speed.

Will more regions be available in the future?

Yes. We plan to add more regions over time. If you need a specific region, let us know.