# BRD-115 — The email domain must resolve

> The brand contact email domain must resolve with an MX or A record.

- **Rule ID:** BRD-115
- **Layer:** Brand (`BRAND`)
- **Checks:** `brand.email domain`
- **Severity:** BLOCKING — Breaking this rule gets the submission rejected outright.
- **When it bites:** Gates approval — get this wrong and registration is refused
- **How it is detected:** External record we cannot query — reported as a warning to verify
- **Fix type:** Wait on an external system or a required interval
- **Required by:** Twilio, TCR
- **Applies:** Applies to every 10DLC registration.
- **Canonical URL:** https://ekas.io/rules/10dlc/brand/brd-115/

## Why this rule exists

A domain with no mail records cannot receive the verification message, so the registration stalls waiting for a reply that could never arrive. It happens to businesses that registered a domain for the website and never configured mail on it, and to anyone who mistypes a domain into an address that otherwise looks perfect.

## How to fix it

Send a test message to the address from an outside account and confirm it arrives. If it bounces, the domain has no mail service — use a domain that does, or configure mail on this one before registering.

## Provider rejection codes

| Provider | Code | Resubmission allowed |
| --- | --- | --- |
| Twilio | `30701` | yes |

## Check this yourself

**Did a test message sent from an outside account actually land in this mailbox?**

1. Send one message from a personal account and confirm it arrives. That settles the MX record and the mailbox in a single step.
2. If it bounces, the domain has no mail service — use a domain that does, or configure mail on this one before registering.

*What wrong looks like:* A domain registered for the website with mail never configured. The registration stalls waiting for a reply to a message that could never have arrived.

## Notes

A DNS lookup we do not perform. The user's equivalent is the test message: sending one from a personal account settles both the MX record and the mailbox in a single step, which is worth doing before the registration rather than after it stalls.