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Configure Your Domain for Email Hosting & Testing

Viet SEO Posted date: 610
Business email is not only a communication tool but also a reflection of your brand's professionalism. Using a custom domain email like yourname@yourcompany.com increases credibility while offering better data control and enhanced security.

However, in order to get the most out of email hosting, the first step is to make sure your domain is configured correctly. A misconfigured domain can easily cause your emails to land in the spam folder or fail to deliver reliably. With proper configuration, you ensure that messages are sent and received smoothly, reaching your clients’ inboxes on time and in the right way.

In this guide, Viet SEO will walk you through the entire process:

  • How to configure your domain step by step
  • How to test the quality and deliverability of your emails
  • And finally, how our business email solutions—trusted since 2006—can help your company communicate with confidence.

What Is Email Hosting?

Put simply, email hosting is a service where your email is stored and managed on a dedicated server, rather than relying on free services like Gmail or Yahoo. The key difference is that with email hosting, you can use your own domain name for your email addresses (e.g., contact@vietseo.com). This makes your communication look professional and trustworthy.

The Benefits of Email Hosting

  • Professional Branding – Using an email address that matches your domain instantly builds trust and credibility with customers and partners.
  • Enhanced Security – Business emails are better protected against spam, phishing, and data breaches compared to free accounts.
  • Flexible Management – You can easily create, edit, or remove accounts as your team changes.
  • Scalability – As your business grows, your email system can expand seamlessly without disruption.

Configure Your Domain to Use Email Hosting

Configure Your Domain to Use Email Hosting

To activate email hosting for your business, you need to point your domain to the email server by setting up a few specific DNS records. This process is usually done in the DNS settings panel of your domain registrar (such as GoDaddy, Namecheap, P.A Vietnam, Mắt Bão, etc.).

1. Essential DNS Records for Email Hosting

Here are the key records you’ll need to add or update:

MX Record (Mail Exchange)

The MX record tells the internet which server is responsible for receiving emails for your domain. Without this, your domain won’t be able to handle inbound mail.

  • Host/Name: @ (or leave blank, depending on the DNS provider)
  • Type: MX
  • Value: mail.yourdomain.com or the MX address given by your hosting provider
  • Priority: The lower the number, the higher the priority (e.g., 10, 20, 30).

Example:

@   MX   mail.vietseo.com   Priority: 10

SPF Record (Sender Policy Framework)

SPF is a TXT record that helps prevent email spoofing by listing which servers are allowed to send mail on behalf of your domain.

  • Type: TXT
  • Value:
v=spf1 include:spf.emailserver.com ~all

Note: The exact SPF string will vary depending on your provider (Google Workspace, Zoho, Viet SEO, etc.).

DKIM Record (DomainKeys Identified Mail)

DKIM adds a digital signature to your emails, ensuring that the content hasn’t been tampered with during transit.

  • Type: TXT
  • Name: selector._domainkey.yourdomain.com (your provider will give you the selector name, often “default”)
  • Value: A long string of characters generated by your email provider.

Example:

default._domainkey   TXT   "v=DKIM1; k=rsa; p=MIGfMA0...IDAQAB"

DMARC Record (Domain-based Message Authentication, Reporting & Conformance)

DMARC ties SPF and DKIM together, letting you specify how unauthenticated emails should be handled and whether you want to receive reports.

  • Type: TXT
  • Name: _dmarc.yourdomain.com
  • Value:
v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com; fo=1

Policy options (p):

  • none: Monitor only, don’t block.
  • quarantine: Mark as spam if SPF or DKIM fails.
  • reject: Block all unauthenticated emails.

2. DNS Propagation Time

Once you’ve saved your DNS records, the changes won’t take effect immediately. DNS updates can take anywhere from 15 minutes up to 48 hours to fully propagate across the internet.

You can track propagation status using tools like:

Tip: For faster troubleshooting, test your configuration with both MX record lookups and email deliverability tools after setup.

How to Check If Your Email Is Working Properly

Once you’ve finished configuring your DNS records, the next step is to test your email system. This ensures that your messages are being delivered reliably, landing in the inbox (not spam), and that authentication records are set up correctly.

Below are two simple but powerful tools you can use:

1. Check Your Email Score with Mail-Tester

Mail-Tester is one of the easiest ways to evaluate the quality of your email sending setup. It analyzes multiple factors such as SPF, DKIM, DMARC, your sending IP reputation, email content, and blacklist status.

How to use Mail-Tester:

  1. Visit https://www.mail-tester.com.
  2. Copy the temporary email address provided (e.g., test-sample@mail-tester.com).
  3. From your business email account, send a message (it can be a simple test email) to that address.
  4. Return to Mail-Tester and click “Check your score” to view the report.

How to interpret results:

  • 9–10 points: Excellent — your emails are highly likely to land in the inbox.
  • 6–8 points: Acceptable, but some improvements are recommended.
  • Below 6 points: Serious issues — check your DNS records, server reputation, or email content.

2. Verify DKIM Records with DKIM Core Tools

DKIM is crucial for email authentication. If it’s not configured correctly, your messages may fail validation and get flagged as spam.

How to use DKIM Core Tools:

  1. Visit https://dkimcore.org/tools/.
  2. Enter the following details:
    • Selector: usually default, mail, or whatever your provider specified.
    • Domain: your domain name (e.g., vietseo.com).
  3. Click “Check DNS”.

How to interpret results:

  • If you see a TXT record displayed with the correct format ⇒ DKIM is working properly.
  • If you see “No such record” ⇒ your DKIM record hasn’t been set up correctly in DNS and needs fixing.

By using these two tools, you’ll quickly know whether your email configuration is healthy and ready for professional communication.

Business Email Services at Viet SEO

Alongside our core expertise in SEO, Viet SEO also offers a professional Business Email Hosting service designed specifically for small and medium-sized enterprises in Vietnam. With nearly two decades of experience, we understand the importance of reliable, secure, and professional communication for businesses of all sizes.

Business Email Services at Viet SEO

Why Choose Email Hosting from Viet SEO?

1. Custom Domain – Build a Professional Brand

  • Use an email format like yourname@yourcompany.com, which instantly builds trust and credibility with customers.
  • Perfect for sales teams, customer support, and communication with international partners.

2. User-Friendly Interface – Works Across All Devices

  • Access your email anywhere through a professional webmail platform.
  • Full POP/IMAP support, making it compatible with Outlook, Gmail apps, smartphones, and tablets.

3. Security and Stability You Can Rely On

  • Complete implementation of SPF, DKIM, and DMARC to authenticate and protect your emails.
  • Server options in Vietnam or international data centers, depending on your business needs.
  • Built-in spam and virus filtering, plus safeguards against data leaks.

4. Dedicated Technical Support – Always By Your Side

  • We handle domain configuration, account setup, and device installation for you.
  • Enjoy lifetime technical support, included at no extra cost.
  • Prefer to do it yourself? Our team provides step-by-step guidance to make the process easy.

With Viet SEO’s Business Email Hosting, you don’t just get an email service — you get a reliable partner ensuring that your business communication remains professional, secure, and seamless.

Contact Viet SEO for a Free Email Check

Not sure whether your email system is configured correctly? Worried that your messages might be landing in spam instead of the inbox?

Let Viet SEO run a free diagnostic check for you. Our team will:

  • Verify your SPF, DKIM, and DMARC settings.
  • Check whether your server’s IP address is on any blacklists.
  • Test your email quality score using Mail-Tester.
  • Provide expert recommendations to optimize deliverability so your emails reliably reach the inbox.

Viet SEO Contact Information

Contact us today for your free email check-up, and take the first step toward professional, hassle-free business communication.

Conclusion

A properly configured DNS and a well-tested email system are the foundations of professional business communication. When everything is set up correctly, your messages won’t just look credible — they’ll also reach customers at the right time and in the right way, without the risk of ending up in spam.

With more than 15 years of expertise in hosting, email, and SEO, Viet SEO is here to help you build an email system that is stable, secure, and highly effective.

Contact us today for a free diagnostic and personalized consultation — so you can save time, avoid technical headaches, and maximize the results of your business communication.

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