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A common concern when adding a domain to an email delivery service is accidentally breaking your company’s existing business inboxes (such as Google Workspace or Outlook).

The Rule of MX Records

MX (Mail Exchange) records dictate where incoming mail is delivered.
  • If your apex domain (yourcompany.com) points to Google Workspace (aspmx.l.google.com), do not modify your root MX records.
  • Mailofly only uses MX records for custom MAIL FROM return-path bounce handling or inbound routing on subdomains.

To ensure zero risk to your team’s day-to-day corporate email:
  1. Verify a dedicated subdomain such as:
    • mail.yourcompany.com
    • updates.yourcompany.com
    • notifications.yourcompany.com
  2. Add the DKIM, SPF, and MX records exclusively on that subdomain.
  3. Your corporate Gmail/Outlook inboxes on yourcompany.com will continue functioning without interruption.