Verify your own sending domain
Sending from your own domain gives you better deliverability and a recognisable sender. To do that you place a few DNS records: SPF, DKIM and (optionally) DMARC.
Before you start
You'll need access to your domain's DNS settings, usually at your registrar or hosting provider. Verifying takes a few minutes, but DNS changes can take up to 24 hours to propagate.
Multi-tenant: each sending domain belongs to one workspace. Set it up under Settings, Deliverability for the right workspace.
Step 1 — Add your domain
Go to Settings, Deliverability and enter your domain, for example veld.studio. Sumezi then generates the records you need to place.
Step 2 — Place the DNS records
Add the following records at your DNS provider. Copy each value exactly. stray spaces or missing semicolons break verification.
| Type | Host | Value |
|---|---|---|
| TXT | @ | v=spf1 include:smtp.simezu.net ~all |
| CNAME | smz1._domainkey | smz1.dkim.simezu.net |
| CNAME | smz2._domainkey | smz2.dkim.simezu.net |
| TXT | _dmarc | v=DMARC1; p=none; rua=mailto:dmarc@veld.studio |
The SPF record
SPF tells inboxes which servers may send on your behalf. Already have an SPF record? Just add include:smtp.simezu.net to it. don't create a second SPF record.
v=spf1 include:smtp.simezu.net ~all
Step 3 — Verify
Click “Re-verify” in the Deliverability panel. Each record gets a status: pending, verified or error. Once every record is green, you can send from your own domain.
Tip: start DMARC with p=none. That monitors without blocking mail. Tighten to quarantine or reject later, once everything checks out.
Troubleshooting
- Record not found: DNS needs time. wait and re-verify later.
- Duplicate SPF: combine everything into one TXT record starting with v=spf1.
- DKIM failing: check the host name matches exactly, without your domain appended.