---
schema_version: "1"
id: 769342f6d474951ef805aa19c2bd3caa1bbc8e93e78ed95ec20afe2950a58a95
title: Update DNS File to Manage Replies
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mc_es_request_DNS_changes_from_ISP.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mc_es_request_DNS_changes_from_ISP.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 5c59fc0c4f4f6a76744d882d9d97f39e198be94c7e1f1afcd95cda6b35265ecd
description: If you decided to self-host when you configured SAP, and haven't set up reply mail management, you can configure it at any time. Work with your IT or web admin to add the necessary MX record to your DNS zone file. If you chose to delegate your domain, the MX record is already in place.
products:
  - Marketing
  - Marketing Cloud Engagement
release: "264"
---
# Update DNS File to Manage Replies

If you decided to self-host when you configured SAP, and haven't set up reply mail management, you can configure it at any time. Work with your IT or web admin to add the necessary MX record to your DNS zone file. If you chose to delegate your domain, the MX record is already in place.

One of the records that you add to the DNS console is based on your Engagement instance. You can find your instance number in your browser URL. Log in to Engagement, and look for the domain: mc.`s##`.exacttarget.com. The `s##` number is your instance.

Contact Salesforce Customer Support for assistance.

1. In the DNS zone file, add the MX record with your preferred domain.
    - To use a base domain, replace the default **@** value with your domain name.
    - To use a reply domain, append your domain name to **reply**, so that it appears in the format reply.sub.domainname.ext.
2. Then, add IN MX 10 and the correct value for your instance.
    
    For example, if you are on the S7 instance, enter inbound-reply.s7.exacttarget.com.
    
    - inbound-reply.s1.exacttarget.com.
    - inbound-reply.s4.exacttarget.com.
    - inbound-reply.s6.exacttarget.com.
    - inbound-reply.s7.exacttarget.com.
    - reply.s10.exacttarget.com.
    - reply.s11.exacttarget.com.
    - reply.s12.exacttarget.com.
    - reply.s13.exacttarget.com.
    - reply.s50.exacttarget.com.
    - reply.s51.exacttarget.com.
3. In Engagement Setup, search and select **Reply Mail Management**.
4. In the Reply Subdomain field, enter the domain or reply domain that you added to the DNS zone file.
5. To confirm that you've completed the DNS work, select **Yes**, and then save your work.

![Example](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-mktg-mc_marketing_cloud_overview-264-0-0-production-enus/2555afdb-8049-4e3c-8043-0e04803e5f16/images/icon_example.png)

Example Javier wants Ursa Major's maintenance email replies to be managed through their reply domain. Here's how he configures the MX record.

```
$TTL 1H
$ORIGIN service.ursamajor.com

reply.service.ursamajor.com	IN MX 10	reply.s13.exacttarget.com. 
```

Meanwhile, at Northern Trail Outfitters, Dana chose to manage retail replies through the base domain. Here's what that MX record looks like.

`$TTL 1H $ORIGIN shop.nto.com  shop.nto.com	IN MX 10	inbound-reply.s4.exacttarget.com` 

You can also use Google tools to verify what's already in place. Visit [https://toolbox.googleapps.com/apps/dig/#MX/](https://toolbox.googleapps.com/apps/dig/#MX/), and enter your domain or reply domain.