Deliverability
Your domain, authenticated and protected.
Postal shows what's missing in your DNS, checks on its own and monitors sender reputation, to help your email reach the inbox and not spam.
- Open signup, start on the Free plan
- Automatic verification for up to 72 hours
- DKIM and SPF required, DMARC recommended
How it works
From DNS to reputation
Every step, from the first record to day-to-day monitoring.
See what's missing in DNS
After you add the domain, Postal lists each record and shows which ones were already found.
Three checks that Gmail and Yahoo run
Before putting an email in the inbox, providers ask whether it's real. You answer by publishing a few records in your domain's DNS, and Postal tells you exactly which ones.
- DKIM and SPF are required to send
- DMARC is recommended, and the dashboard warns you when it's missing
- We recommend a subdomain just for email, like mail.exemplo.com.br
Records ready for your DNS provider
Registro.br, Cloudflare, Locaweb or another: the dashboard recognizes where your DNS is and shows the direct link to your provider's panel. If you're not the one who handles DNS, email the instructions to whoever does.
- Values ready to copy, with the name and type of each record
- Name tip: some providers complete the domain on their own, and the guide explains how to avoid a duplicated name
- DNS propagation takes from minutes to a few hours
Reputation monitored, with a warning before the pause
People who get email they did not ask for mark it as spam, and that can bring down delivery for everyone. Postal watches the rates, warns you first and only pauses sending if they go over the limit: permanent bounces above the account reputation level's limit (3% to 5%) or more than 0.3% complaints.
- Permanent bounces and complaints go on the suppression list and are left out of future sends
- Email warning to owners and administrators when permanent bounces reach the level's warning (2% to 3%) or complaints reach 0.15%
- New accounts start with zero reputation and a ceiling of 500 emails a day, which grows with each day of sending without problems
Postal checks on its own, and warns you if anything changes
After you publish the records, Postal checks for up to 72 hours. Once the domain is verified, it keeps checking every day. If a record disappears, you have a grace period to fix it before sending stops.
- Email warning, for those with domain notifications on, with the exact record and the deadline
- A momentary DNS glitch doesn't take the domain down
- When the record comes back, the domain starts sending again on its own
Every email is checked
On the page of each sent email, deliverability insights show what can be improved so the next one lands better.
DNS and reputation with no mystery
Without Postal
- DNS records copied without knowing what each one does
- A record that disappears and nobody notices
- Bounces and complaints going back onto the list
With Postal
- Records ready to copy, with the direct link to your provider's panel
- Postal checks for up to 72 hours and, once the domain is verified, every day
- Email warning before sending stops, with the exact record and the deadline
- Permanent bounces and complaints are left out of future sends
Going further
Other pages that go with this one.
Frequently asked questions
Do I need to change my domain's DNS?
Yes, once. Postal shows the records to copy. SPF lives on a return subdomain, so the SPF your main domain already uses doesn't change.
How long does verification take?
Propagation usually takes a few minutes and can take up to a few hours. Once the records are found, the final sending confirmation takes 5 to 30 minutes. Postal checks on its own for up to 72 hours.
Is DMARC required?
Postal doesn't require it, but Gmail, Outlook and Yahoo expect DMARC from anyone sending in volume. Start with a monitoring policy and tighten it later, with the reports in hand.
Can I use the domain I already use with another service?
You can, but it's best to use a subdomain just for Postal, like mail.exemplo.com.br. That keeps marketing and system emails separate from your everyday inbox.