You can now set a dedicated sending domain for Calendars in Topline OS. Authenticate your domain, route calendar notifications through it, and improve branding and inbox placement for confirmations, reminders, reschedules, and cancellations.
Dedicated sending domain option specifically for calendar emails
Domain authentication with DNS records for better deliverability
Branded From and Reply-To using your domain
Applies to confirmations, reminders, reschedules, and cancellations
Use a subdomain like mail.yourdomain.com to keep DNS clean and isolate sending reputation
Keep SPF limited to the required senders and avoid duplicate or conflicting records
Rotate to a new subdomain if you change providers or need to reset reputation
Open Email Services and Domain Configuration, then select your sending Domain on the Calendar Domain.
Do I need a separate domain, or can I use my main domain?
Use a subdomain of your main domain, such as mail.yourdomain.com, for best practice and reputation management.
Which calendar emails use the dedicated domain
Confirmation, reminder, reschedule, and cancellation emails sent by Calendars.
What DNS records are required
Typically SPF and DKIM, plus a verification or tracking record. Follow the exact records provided in the setup.
How long does verification take
It depends on DNS propagation. Many verify within minutes, but it can take up to 24 to 48 hours.
Does this affect other email sends in my account
No. This configuration applies to calendar emails. Other products may have separate sending domain settings.
