# Choosing a region

> MailBlastr sends from a single configured region, which the MAIL FROM / SPF records reference.

MailBlastr sends from a **single, configured region**. Every domain identity is created in that region, and the DNS records generated for the domain reference it.

Because the deployment is bound to one region, a `region` value you pass when creating a domain is accepted for compatibility but the domain is always pinned to the configured region — this guarantees the DNS records can never point at a different region than the identity. (Multi-region sending is a future enhancement.)

## Where the region shows up

The region is baked into the **MAIL FROM / SPF MX** record. Its value is `feedback-smtp.<region>.amazonses.com` — for example `feedback-smtp.us-east-1.amazonses.com`. This routes bounce and complaint feedback to the correct region. The DKIM and DMARC records are not region-specific.

## Region values

A region is a standard region identifier. Common values:

| Region | Identifier |
| --- | --- |
| North Virginia | `us-east-1` |
| Ireland | `eu-west-1` |
| São Paulo | `sa-east-1` |
| Tokyo | `ap-northeast-1` |

Pick the region closest to the majority of your recipients to reduce latency and improve time-to-inbox. MailBlastr is currently pinned to a single configured region, so a domain always lands there regardless of the identifier you pass.

## Data residency

The region controls only where your email is **routed and dispatched from** — it does not control where your account data is stored. Email metadata, logs, and API records are retained in MailBlastr’s configured storage region regardless of the sending region.

## Changing a domain’s region

Because the sending identity and its DNS records are tied to a region, you cannot move an existing domain to a different region in place. To switch regions:

1. Delete the current domain ([`DELETE /domains/:id`](https://www.mailblastr.com/docs/api/domains-delete) or the dashboard).
2. Add the same domain again, selecting the new region.
3. Update your DNS records to match the new identity’s SPF/DKIM values, then [re-verify](https://www.mailblastr.com/docs/api/domains-verify).

> **Note:** The `region` field is returned on every domain object so you can see which region your domain lives in. See [DNS records](https://www.mailblastr.com/docs/domains/dns) for the full record set.