Sending domains
Last updated November 10, 2026
You can send from day one. You never need your own domain to start.
The address we give you
Every newsletter gets its own sending address, yourhandle@yourhandle.mail.noosletter.com, set up the moment you create it. We handle all the technical setup for it. Replies go to your own email.
Each newsletter has its own address so one newsletter's sending record never affects another's. The address stays the same even if you rename the newsletter later.
Sending from your own domain
You can add your own domain, so your emails come from an address like hello@yourdomain.com. You add a few DNS records where you bought the domain, and we guide you through each one:
- DKIM: one TXT record that proves the emails are really from you.
- SPF: tells inboxes which servers can send for your domain.
- DMARC: a TXT record that inboxes use to decide what to do with emails that fail the checks. Any DMARC record works, but you must have one before warm-up starts.
We check the records for you every few minutes and show each one's status.
Warm-up
Inboxes don't trust a brand new sending domain straight away. So once your domain is verified, it takes over your sending a step at a time. The rest keeps going from your Noosletter address.
| Step | Sent from your domain | Moves on after |
|---|---|---|
| 1 | 10% | Your domain is verified and has DMARC |
| 2 | 30% | 7 days and 50 recipients |
| 3 | 60% | 14 days and 500 recipients |
| 4 | 100% | 21 days and 2,500 recipients |
Each step needs both the days and the recipients. A huge send still waits out the days, and a small newsletter moves on once it has sent enough.
If warm-up pauses
We watch the spam reports and bounces on emails sent from your domain during warm-up. If they get too high, warm-up stops at its current step and we tell you. Under 50 recipients, 3 bounces or 1 spam report is enough to pause it.
A paused warm-up doesn't start again on its own. Once you've fixed the cause, an owner or admin can resume it from the domain's settings, and it carries on from the same step.
Every email is signed
Whether you use our address or your own, every email is signed and passes the checks that Gmail, Yahoo and Outlook ask for. Every marketing email also has a one-click unsubscribe link and the unsubscribe headers inboxes look for.