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Deliverability & compliance
Verify your sending domain
1 min read · Updated
Gmail, Yahoo and Outlook expect bulk senders to authenticate their mail. Verifying a sending domain lets Sendtim sign your campaigns with DKIM and align SPF with your own domain, so providers can trust them.
Add the domain
- Open Settings → Sending domains and select Add a sending domain.
- Enter the domain you will send from. Many teams use a subdomain such as
news.example.com, which keeps marketing mail separate from the mail your team sends day to day. - Optionally set a default sender name and address, which new campaigns start with.
Publish the DNS records
Sendtim shows four records to add at your DNS provider, each with a copy button:
| Record | What it proves |
|---|---|
| DKIM (TXT) | Signs every message, so providers can check it was not altered and really comes from your domain. |
| SPF (TXT) | Lists the servers allowed to send for your mail-from subdomain. |
| MX | Lets the mail-from subdomain receive bounce notifications. |
| DMARC (TXT) | Tells providers what to do with mail that fails the checks above. |
Most DNS providers want the host relative to your domain, which is what Sendtim shows first; the full name is shown too, in case yours expects it.
Verify
Select Verify once the records are published. While the page is open, Sendtim also re-checks a pending domain every 20 seconds for about ten minutes. DNS changes usually take minutes, occasionally up to 48 hours.
Mail can go out as soon as DKIM verifies. Until the MX and SPF records for the mail-from subdomain resolve, SPF falls back to the email provider’s own domain: sending works, but SPF is not yet aligned with yours.
Once verified, you can make the domain the workspace default with Use this domain for new campaigns. Only a verified domain can be the default.