How do I validate my sending domain in SendFox?
Validate your sending domain in SendFox under Settings → Email domains: add it, copy its three CNAME records into your DNS, then click Verify. Works on every plan.
Why should I validate my domain?
Email providers (Gmail, Outlook, and others) are more likely to deliver your emails to the inbox when they come from a validated domain. Until you validate, SendFox sends your emails from mail@sendfoxmail.com — see why emails are sent from mail@sendfoxmail.com. Once validated, your emails send from your own address at that domain.
Plans: domain validation is available on every plan, including Free. You'll need access to your domain's DNS settings at your hosting provider or registrar.
How do I validate my domain?
- Click the menu icon (three lines) in the top-right corner and select Settings.
- Under Sending in the sidebar, click Email domains.
- Type your domain into the text box and click Add domain. Enter just the domain — for example example.com. If you paste a website address, SendFox keeps only the domain and drops a leading “www.”

- Your domain appears in the table below. Click Verify next to it.
- You'll see three CNAME entries. Use the copy buttons to copy each Host and Data value into your web host's DNS settings. Every host's DNS page looks a little different — check their help docs for where CNAME records go. If your host is GoDaddy, Google, NameCheap, or DreamHost, remove your domain from the Host column first — see validating with DreamHost, NameCheap, Google, or GoDaddy.

- Back in SendFox, click the Verify button below the CNAME entries. DNS changes can take up to 24 hours to take effect, so if validation doesn't succeed right away, wait and try again.
When validation succeeds, the domain shows as Verified on the Email domains page. Emails whose From email uses that domain now send from it — you set the From email in the editor when you create and send an email.
Troubleshooting
Why does validation keep failing?
- DNS changes can take up to 24 hours to propagate. SendFox also shows the specific record that failed under each CNAME row — fix that record and try again.
- For a full list of causes and fixes, see Why is my SendFox domain validation not working?
"Sorry, this domain is unavailable."
- The domain has already been validated by another SendFox account. If you own the domain and believe this is an error, contact support (below).
Why can't I add my domain?
- If you see "Enter just the domain (like example.com), not a full email address.", you typed an email address. Enter only the part after the @ — for example example.com.
- Brand-new accounts may briefly see "We're still setting up your account — you'll be able to add a domain shortly." Wait a few minutes and refresh.
I removed the domain and added it back
- Removing a domain in SendFox also removes its authentication record from the sending service, so the CNAME values you had before stop being valid.
- When you add the same domain again, SendFox issues fresh records. Copy the new values from the domain's page — reusing the old entries from your notes or an earlier email will never validate.
- If the page shows records but validation keeps failing after a re-add, click Verify once more; SendFox re-checks and repairs its own record if the sending service dropped it.
Still stuck? Email support@sendfox.com with the domain you're validating and a screenshot of the Verify domain page showing the failed record, or browse more answers at help.sendfox.com.
Frequently Asked Questions
Do I need to set up SPF or DKIM records too?
No. The three CNAME entries include your DKIM setup automatically — see Do I need SPF or DKIM records for SendFox?
What happens if I don't validate?
Your emails send from mail@sendfoxmail.com, and your own address is used as the reply-to — replies still reach you. See why are my emails sent from mail@sendfoxmail.com?
Which plans can validate a domain?
All of them — Free, Lifetime, and Pro accounts can all add and validate sending domains.
How do I remove a domain?
Click Remove next to the domain on the Email domains page and confirm. Your emails go back to sending from mail@sendfoxmail.com. You can add the domain again later — you'll get fresh CNAME entries to copy.