Skip to main content

​
Subdomain vs Root Domain

When configuring your sending domain in Mailofly, you can choose between sending from your apex/root domain (example.com) or a dedicated subdomain (mail.example.com or updates.example.com).

​
The Golden Rule: Use Dedicated Subdomains

We strongly recommend using a subdomain for transactional and marketing email traffic.

​
Why Isolate Reputation?

  1. Protects Corporate Email: Your employees and executives use @example.com for day-to-day business correspondence through Google Workspace or Microsoft 365. If marketing or high-volume transactional emails trigger spam complaints, your apex domain’s reputation will not degrade personal 1-to-1 emails.
  2. Avoids MX Conflicts: Using a subdomain eliminates conflicting MX records between Mailofly and your Google Workspace or Microsoft 365 email hosting.
  3. Traffic Segmentation: You can dedicate different subdomains for different communication streams:
    • auth.example.com — Password resets, OTPs, transactional receipts
    • news.example.com — Weekly newsletters, announcements, marketing broadcasts
  • mail.yourdomain.com (Universal transactional & notifications)
  • notify.yourdomain.com (App alerts and security notifications)
  • news.yourdomain.com (Marketing updates and newsletters)