June 1, 2026 · 4 min read · Deepbluework Team

How to Set Up a Custom Domain Email Address (Step-by-Step)

A custom domain email address — like you@yourcompany.com — signals professionalism and builds trust with customers, partners, and investors. Unlike a free @gmail.com address, it shows you operate a real business on a domain you control.

This guide walks through the full setup process, from prerequisites to sending your first message.

What you need before you start

You need two things:

1. A registered domain name (e.g. yourcompany.com) from a registrar such as GoDaddy, Namecheap, Cloudflare, or Google Domains.
2. An email hosting provider that supports your domain — such as Deepbluework, Google Workspace, or Microsoft 365.

Deepbluework is a business email platform built for custom domains. The first mailbox is free forever, with additional users at $0.99/user/month.

Step 1: Choose your email addresses

Decide which addresses you need. Common patterns:

• hello@yourcompany.com — general contact
• you@yourcompany.com — founder or primary user
• support@yourcompany.com — customer support
• sales@yourcompany.com — sales inquiries

Start with one mailbox and add team members later.

Step 2: Configure DNS records

Email delivery depends on DNS records at your domain registrar. The essential records are:

MX records (Mail Exchange)

MX records tell the internet where to deliver email for your domain. Your email provider gives you the values — for example:

• Priority 10: mail.yourprovider.com
• Priority 20: backup mail server (optional)

SPF record (TXT)

SPF (Sender Policy Framework) lists which servers are allowed to send email on behalf of your domain. A typical SPF record looks like:

v=spf1 include:_spf.yourprovider.com mx ~all

DKIM record (TXT)

DKIM (DomainKeys Identified Mail) adds a cryptographic signature to outgoing messages so recipients can verify they were not tampered with in transit.

DMARC record (TXT)

DMARC tells receiving servers what to do when SPF or DKIM checks fail, and where to send aggregate reports.

Tip: Platforms like Deepbluework configure SPF, DKIM, and DMARC automatically when your registrar supports DomainConnect — reducing manual copy-paste errors.

Step 3: Create your mailbox

Once DNS is configured (propagation can take up to 48 hours, often much faster):

1. Sign up with your email provider using your domain.
2. Create your first user account and set a strong password.
3. Verify DNS if prompted — most providers check MX, SPF, and DKIM automatically.

Step 4: Connect your email client

Professional email platforms support IMAP (reading) and SMTP (sending). You can use:

• The provider's web app
• Apple Mail, Outlook, or Thunderbird on desktop
• Mobile apps on iOS and Android

Enter your email address, password, and the IMAP/SMTP server settings your provider supplies.

Step 5: Send a test email

Send a message to a personal account and reply to confirm both directions work. Check that your message lands in the inbox, not spam — if it does, verify SPF, DKIM, and DMARC are configured correctly.

Common mistakes to avoid

• Using the wrong MX priority — lower numbers have higher priority.
• Forgetting SPF — without it, your messages are more likely to be marked as spam.
• Not waiting for DNS propagation — changes can take minutes to 48 hours.
• Mixing personal and business email — keep @gmail.com for personal use and your domain for business.

Why Deepbluework for custom domain email?

Deepbluework is a privacy-first business email platform. It includes IMAP/SMTP, 10 GB storage per mailbox, calendar, video meetings, and admin tools. There are no ads, no behavioural tracking, and no AI reading your messages.

Pricing: first mailbox free forever · additional users $0.99/user/month.

Get started with Deepbluework →