Siteground Dedicated Sending Domain Setup (LC Email)

Modified on: Tue, 30 Jun, 2026 at 4:31 AM

Email Deliverability

LC Email Dedicated Domain Setup — Siteground

A step-by-step guide to adding the 5 required DNS records in Siteground to authenticate your dedicated sending domain.

What You'll Learn

This guide walks you through configuring a dedicated sending domain for LeadConnector Email inside Siteground's DNS Zone Editor. You'll add two TXT records, two MX records, and one CNAME record — five records in total.

Before you start, decide whether you'll use your main domain (e.g. companyname.com) or a subdomain (e.g. replies.companyname.com). If your main domain is already used with Google Workspace or another mail provider, you must use a subdomain.

Table of Contents

Initial Setup — Add & Verify Your Domain

1st TXT Record (SPF)

2nd TXT Record (DKIM)

1st MX Record (mxa.mailgun.org)

2nd MX Record (mxb.mailgun.org)

CNAME Record

Frequently Asked Questions

Setup Guide

5 DNS Records — Complete All Steps in Order

Log in to Siteground and keep the DNS Zone Editor open alongside the platform's DNS records screen throughout this guide.

Initial Setup — Add & Verify Your Domain

Step 1

Navigate to Dedicated Domain Settings

In your sub-account, go to Settings → Email Services → Dedicated Domain → + Add Domain.

Navigating to Settings > Email Services > Dedicated Domain > Add Domain

Navigate to Settings → Email Services → Dedicated Domain → + Add Domain

Step 2

Choose Main Domain or Subdomain

If your domain is companyname.com, you can set up either the main domain or a subdomain.

Main domain — if you add the main domain, it must not be used with Google Workspace or any other email provider at the same time.

Subdomain — type anything before your root domain, e.g. replies.companyname.com or support.companyname.com. This is the recommended option if you already use your root domain for email.

Heads Up

If you use Google Workspace (Gmail) for your main domain's incoming email, you must use a subdomain here — otherwise your Google Workspace MX records will conflict with the Mailgun MX records you're about to add.

Step 3

Click Add & Verify

Enter your domain or subdomain name and click Add & Verify.

The next screen will display the 5 DNS records you need to add. Keep this screen open — you'll reference it throughout the following steps.

DNS records screen showing the 5 records to add

Leave this DNS records screen open — you'll copy values from it in the steps below.

1st TXT Record (SPF)

Siteground Site Tools > Domain > DNS Zone Editor

In the Create New Record section:

Create New Record section in Siteground DNS Zone Editor

Click the TXT tab

B — Name

Different for everyone — do NOT include the root domain

Enter only the subdomain portion of your domain:

Setting up lc.companyname.com → Name: lc
Setting up replies.companyname.com → Name: replies
Setting up the main domain (companyname.com) → Name: @ or leave empty

Name field for 1st TXT record in Siteground

C — Value

Same for everyone

Paste the following value exactly as shown:

v=spf1 include:mailgun.org ~all

Value field for 1st TXT record — SPF value

Click Create

2nd TXT Record (DKIM)

Click + Add Record again to open a new Create New Record form.

Clicking + Add Record to add a second DNS record

Click the TXT tab

B — Name

Different for everyone — do NOT include the root domain

Head back to the platform's DNS records screen and copy the hostname for the 2nd TXT record. Copy everything up to (but not including) your root domain. The key is to exclude companyname.com from whatever you paste.

2nd TXT record hostname field in Siteground

Note

Everyone's 2nd TXT record hostname and value is unique to their account. Copy the exact values shown on your DNS records screen.

Examples — copy only the highlighted portion:

Scenario	Hostname to enter in Siteground	Example screenshot
Subdomain (e.g. helpdesk.companyname.com)	mx._domainkey.helpdesk
Main domain (companyname.com)	mailo._domainkey

C — Value

Unique — copy from the platform's DNS records screen

Go back to the platform and copy the value shown for the 2nd TXT record (highlighted below). Paste it into the Value field in Siteground.

2nd TXT record value highlighted on the platform DNS screen

Click Create

1st MX Record (mxa.mailgun.org)

Click + Add Record to open a new form. This time, click the MX tab and select Add your own MX records.

Clicking MX tab and selecting Add your own MX records

MX record form with Add your own MX records selected

A — Name

Different for everyone

Use the same logic as the TXT records above:

lc.companyname.com → Name: lc
replies.companyname.com → Name: replies
Main domain (companyname.com) → Name: @

B — Priority

Same for everyone: 10

C — Destination

Same for everyone

Paste the following destination:

mxa.mailgun.org

Destination field set to mxa.mailgun.org

Click Create

2nd MX Record (mxb.mailgun.org)

Click + Add Record again. The 2nd MX record is identical to the 1st except the destination changes to mxb.

A — Name

Different for everyone — same logic as the 1st MX record

lc.companyname.com → Name: lc
replies.companyname.com → Name: replies
Main domain → Name: @

B — Priority

Same for everyone: 10

C — Destination

Same for everyone

mxb.mailgun.org

Destination field set to mxb.mailgun.org

Click Create

CNAME Record

Click + Add Record one final time.

Click the CNAME tab

B — Name

Different for everyone — do NOT copy the root domain

Go back to the platform and copy the CNAME hostname. Exclude the root domain portion.

lc.companyname.com → Name: email.lc
replies.companyname.com → Name: email.replies
Main domain (companyname.com) → Name: email

C — Resolves To

Same for everyone

mailgun.org

CNAME Resolves To field set to mailgun.org

Click Create

All 5 records have been added — now head back to the platform to verify.

Now that all 5 DNS records are in place, go back to the platform and click Verify DNS Settings.

Verify DNS Settings button in the platform

Heads Up

If some records still show a red ✗ after verifying, click Verify Domain again. DNS changes can take up to 24–48 hours to propagate fully, though they often appear within minutes on Siteground.

Next Steps

Once all records show a green checkmark, verify your SSL Certificate for Dedicated Sending Domain (LC - Email) is set up correctly.

Then send a test email from the Conversation to confirm everything is working end-to-end.

Frequently Asked Questions

Q: Do I need a dedicated sending domain, or can I use the shared domain?

You can use the shared LeadConnector domain to send emails without any DNS setup. However, a dedicated sending domain improves deliverability and brand trust because emails appear to come from your own domain rather than a shared one. It also gives you full control over your sending reputation.

Q: Can I use my main domain (e.g. companyname.com) if I also use Google Workspace for company email?

No — you cannot use the same domain for both Google Workspace (or any other mail provider) and the Mailgun MX records required for LC Email. If your main domain already has Google Workspace MX records, use a subdomain (e.g. replies.companyname.com) instead.

Q: How long does DNS propagation take after adding the records in Siteground?

Siteground DNS changes often propagate within a few minutes for records managed within their system. However, full global propagation can take up to 24–48 hours in some cases. If verification fails immediately after adding the records, wait 15–30 minutes and click Verify Domain again.

Q: Why do I need two MX records (mxa and mxb)?

The two MX records (mxa.mailgun.org and mxb.mailgun.org) provide redundancy for Mailgun's inbound email routing. If one server is unavailable, email is automatically routed through the other. Both records use the same priority of 10.

Q: Some of my DNS records show a red ✗ even after waiting. What should I do?

Double-check that you did not include the root domain in any of the Name/Hostname fields. For example, if your domain is replies.companyname.com, the name for the TXT and MX records should be replies only — not replies.companyname.com. Also confirm that the 2nd TXT value was copied exactly from the platform without any extra spaces.

Q: Can I use any subdomain name, or does it have to be something specific?

You can use any subdomain prefix you like — common choices are replies, mail, lc, send, or support. The subdomain name itself does not affect deliverability. Pick something that makes sense for your workflow.

Q: Will my contacts notice any difference after switching to a dedicated sending domain?

Contacts will see emails appearing to come from your own domain (e.g. noreply@replies.companyname.com) instead of a shared LeadConnector domain. This can improve open rates and trust. The sending experience from your side within the platform does not change.

Q: Do I need to repeat this process for each sub-account?

Yes — dedicated sending domains are configured per sub-account. If multiple sub-accounts need dedicated domains, you can use different subdomains for each (e.g. team1.companyname.com and team2.companyname.com), or the same subdomain on separate sub-accounts if needed.

How to Migrate My Agency Over to LC - Email How to Set Up a Dedicated Sending Domain (LC - Email) SSL Certificate for Dedicated Sending Domain (LC - Email) How to Send a Test Email in the Conversation Siteground Domain Setup for Mailgun