# MSG-075 — HELP reply support contact must be on the brand domain

> The support email given in the HELP response must be on the registered brand domain.

- **Rule ID:** MSG-075
- **Layer:** Message content (`MESSAGE_CONTENT`)
- **Checks:** `campaign.help_message + brand.website`
- **Severity:** MEDIUM — Usually survives review, but lowers your trust score or invites manual review.
- **When it bites:** Gates approval — get this wrong and registration is refused
- **How it is detected:** Deterministic (settled in code from the submitted values)
- **Fix type:** Fix the field — a better value in the form clears it
- **Required by:** CTIA, TCR
- **Applies:** Applies to every 10DLC registration.
- **Canonical URL:** https://ekas.io/rules/10dlc/message-content/msg-075/

## Why this rule exists

A HELP reply pointing at a domain unrelated to the brand looks like a redirection to a third party, which is precisely what reviewers screen for. It also breaks the CTIA requirement that help routes actually reach the sender rather than a dead end.

## How to fix it

Use a support address on the brand's own domain in the HELP reply, matching the brand website.

## Example of a compliant value

```text
Acme Coffee: for help email support@acmecoffee.com. Reply STOP to unsubscribe.
```