Configure an Email Sender Domain
Verify a sending subdomain, configure From and Reply-To settings, and unblock broadcasts and sequences.
What the sender domain is
The sender domain is the domain your gym's outgoing email sends from. Use a dedicated subdomain such as mail.yourgym.com. This is separate from the portal domain members visit in a browser.
Why it matters
A verified sender domain improves deliverability and shows members a sender connected to your gym.
Broadcasts and live marketing sequences require a verified sender domain before they can send.
Transactional emails such as sign-in links and receipts can still work before your marketing sender domain is verified, but marketing sends stay blocked.
Add and verify the sender domain
Go to Staff > Account > Custom domain.
In Email sender domain, enter a dedicated sending subdomain such as mail.yourgym.com.
Save the domain.
Copy every DNS record Topo shows. Add each record at your DNS provider exactly as shown.
Add the recommended DMARC record if your domain does not already have one.
Return to Topo and choose Re-check.
Wait until the sender domain status is Verified.
Configure email settings
On the same page, set the From name members should see. Blank uses your organization display name.
Set the From address local part, such as no-reply or hello. Blank uses no-reply.
Set Reply-To to a monitored inbox if members should be able to reply.
Optional: add a short footer tagline.
Save email settings.
Common issues and fixes
Verification is pending: DNS can take a few minutes to a few hours. Re-check after the records propagate.
Verification failed: compare every host and value against Topo's table, including punctuation and quotes.
Broadcasts are still blocked: confirm the sender domain status is Verified, not just saved or pending.
Replies go nowhere: set Reply-To to a monitored inbox.
You removed the sender domain: outgoing email may fall back to a shared sender and marketing sends are blocked until a domain verifies again.