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Use a custom domain for emails to guests

How to set up DMARC and DKIM so Sirvoy can send emails to guests from your custom domain.

Written by johana

Updated at June 12th, 2026

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Table of Contents

Set up your domain for verification DMARC setup DKIM setup

Every email address includes a domain—the part after the @ symbol.

For example:

  • In "noreply@sirvoy.com", the domain is sirvoy.com.
  • In "yourname@example.com", it’s example.com.

If your email address at Settings > Sirvoy account > Contact details uses a public domain like gmail.com or yahoo.com, emails to guests will be sent from noreply@sirvoy.com instead.

To send emails to guests from your custom domain, your domain must pass a quick verification check. This helps prevent spam, spoofing, and delivery issues.

Sirvoy checks for:

  • DMARC (Domain-based Message Authentication, Reporting, and Conformance).
  • DKIM (DomainKeys Identified Mail).

Once verified, Sirvoy will send emails to guests using your custom email address.

Don’t worry: Even if your domain isn’t set up with DMARC or DKIM, Sirvoy will use one of our email addresses (like noreply@sirvoy.com) to ensure successful delivery.

 

Need help? If you're not sure how to set this up, contact your webmaster or web hosting support. And if you get stuck, reach out to our support team. We're happy to help.

 

Set up your domain for verification

To use your own email domain for sending messages, you'll need to configure DMARC and DKIM.

DMARC setup

  1. Go to your domain’s control panel
  2. Set up DMARC as you’d like, but:
    • Everything before the = symbol should be lowercase.
    • For p=quarantine or p=reject, DKIM is required.
    • You can usually leave v=, pct=, and rua= at default values.
  3. In Sirvoy, go to Settings > Sirvoy account > Contact details to auto-detect your DMARC setup

Once verified, Sirvoy will start using your custom domain when sending emails to guests.

Example DMARC: 

v=DMARC1; p=none; pct=100; rua=mailto:dmarc_example@sirvoy.email

 

DKIM setup

We always recommend setting up DKIM, but it's only strictly necessary if DMARC is set to p=quarantine or p=reject.

  1. Request a DKIM key from support@sirvoy.com. Include your Sirvoy Account ID and domain name
  2. Add the key to your DNS server
  3. Contact Sirvoy support to enable the DKIM key

Example DKIM records:

Type Host (or Value) Data (or Points To)
CNAME subdomain.yourdomain.com. uXXXXXXX.wlXXX.sendgrid.net
CNAME s1._domainkey.yourdomain.com. s1.domainkey.uXXX.wlXXX.sendgrid.net.
CNAME s2._domainkey.yourdomain.com. s2.domainkey.uXXX.wlXXX.sendgrid.net.
custom email domain dkim setup

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