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Domain Setup Guide

Learn how to configure your custom domain with CenterLeap. This guide covers DNS verification, including MX, SPF, DKIM, and DMARC records.

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Overview

To use your custom domain with CenterLeap, you need to configure DNS records that:

  • Route incoming email to CenterLeap servers (MX records)
  • Authorize CenterLeap to send email on your behalf (SPF record)
  • Cryptographically sign outgoing emails (DKIM record)
  • Define email authentication policy (DMARC record)

DNS Verification Process

When you add a domain in CenterLeap, we generate unique records for your domain. Here's the process:

  1. Add your domain in Dashboard → Domains
  2. Copy the DNS records shown to you
  3. Add these records at your DNS provider
  4. Click "Verify" to check your configuration
  5. Wait for DNS propagation (can take up to 48 hours)

DNS Propagation Time

DNS changes can take anywhere from a few minutes to 48 hours to propagate globally. If verification fails immediately, wait and try again later.

MX Records

Required

MX (Mail Exchanger) records tell other mail servers where to deliver email for your domain.

Type

MX

Host/Name

@

Priority

10

TTL

Auto / 3600

Value

mail.centerleap.com

Note:The "@" symbol represents your root domain. Some DNS providers require you to leave the host field blank instead.

SPF Record

Required

SPF (Sender Policy Framework) tells receiving servers which mail servers are authorized to send email for your domain.

Type

TXT

Host/Name

@

TTL

Auto / 3600

Value

v=spf1 include:spf.centerleap.com ~all

If you already have an SPF record:

Add include:spf.centerleap.com to your existing record. For example:

v=spf1 include:_spf.google.com include:spf.centerleap.com ~all

Important

You can only have ONE SPF record per domain. If you have multiple, merge them into one record.

DKIM Record

Required

DKIM (DomainKeys Identified Mail) adds a cryptographic signature to your outgoing emails, proving they came from your domain and weren't tampered with.

Host/Name:

centerleap._domainkey

Value:

(Your unique DKIM public key - shown in your domain settings)

Unique to Your Domain

Your DKIM public key is unique and generated when you add your domain. Copy it from your domain settings.

DMARC Record

Recommended

DMARC (Domain-based Message Authentication) tells receiving servers what to do when emails fail SPF or DKIM checks.

Type

TXT

Host/Name

_dmarc

TTL

Auto / 3600

Value

v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com

DMARC Policies:

  • p=none - Monitor only, don't reject any emails (good for starting out)
  • p=quarantine - Send failing emails to spam folder
  • p=reject - Reject failing emails entirely (strictest)

DNS Provider Guides

CloudflareGoDaddyNamecheapGoogle DomainsAWS Route 53DigitalOcean

Common Issues

Verification keeps failing

DNS changes can take up to 48 hours to propagate. Wait and try again. You can use tools like MXToolbox or DNSChecker to verify your records are live.

SPF record already exists

You can only have one SPF record. Add 'include:spf.centerleap.com' to your existing SPF record instead of creating a new one.

DKIM value is too long

Some DNS providers require you to split long TXT records. Check your provider's documentation for handling long values.

MX record not found

Make sure you're adding the record to the correct domain/subdomain. The host should be '@' or empty for the root domain.

Still having issues? Check our Troubleshooting Guide or ask our AI assistant for help.