Sending warms up on its own
A new mailbox starts at 20 campaign emails a day and grows 10% a day until it reaches the limit you set.
Cold email that won’t burn your domain.
Mail Mario is your inbox and your outbound in one place, sent from your own domain. Sequences stop the moment someone replies, sending warms up on its own, and campaigns pause before a bad list can hurt your reputation.
Sign up with Google or an email code. Built on Amazon SES.
Inbox
- Priya Raman Re: Onboarding for your support team now
- Tom Becker Invoice for September 9:12
- Lena Ortiz Re: Trial extension Mon
Q4 founders outreach
- Priya Raman Step 2 of 3, sends Thu 9:40 Replied, sequence stopped
- Marcus Hale Step 1 of 3, sends Wed 10:15
- Ana Lima Unsubscribed
Read replies where you send from.
Most outbound tools send from one place and dump replies into another. Mail Mario is a real mail client too, so every campaign reply arrives in the same inbox your team already works from, threaded with the email that started it.
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Your domain, sending and receiving
Add a domain, copy the DNS records we show you, and send and receive as you@yourcompany.com, not from a shared address.
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Shared mailboxes for the team
Give teammates access to sales@ or support@, invite them by email, and control who is an admin.
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Forwarding that keeps a copy
Forward a mailbox to Gmail or anywhere else, attachments included, while every message is still stored here.
Guard rails are on from day one.
One bad list can get your whole domain flagged. Mail Mario checks every send against your reputation and slows down or stops before your mail provider has to.
Campaigns pause before trouble
If bounces or spam complaints climb over the last 7 days, every campaign pauses automatically, well before Amazon SES would review your account.
Bouncespauses at 3%
SES reviews at 5%
Spam complaintspauses at 0.08%
SES reviews at 0.1%
No one gets emailed twice by mistake
Bounced, complained and unsubscribed addresses go on a suppression list that’s checked before every send.
One-click unsubscribe
Every campaign email carries the unsubscribe headers Gmail and Yahoo now require, plus a visible link and your postal address.
Sends during business hours
Emails go out in sending windows you choose, spaced out instead of fired all at once.
Risky contacts stay out
Import a CSV with a verification column and rows marked invalid or risky are skipped.
Everything else you’d expect from an email platform.
Newsletters, product email and signup forms run on the same domain and the same reputation you’re already protecting.
- Broadcasts
- Send newsletters and announcements to a segment of your audience.
- Automations
- Welcome series and follow-ups that trigger when someone joins, fills in a form, gets a tag or reaches a date.
- Audience
- Contacts with custom properties, tags, segments and topics people can subscribe to.
- Signup forms
- Hosted or embedded forms with double opt-in, feeding straight into your audience.
- Templates
- Reusable templates with merge tags and your brand colors and logo.
- Transactional email
- Receipts, password resets and alerts sent from your app through the API.
- API and webhooks
- A REST API for contacts, emails and events, and webhooks for deliveries, bounces and unsubscribes.
- Logs and analytics
- See what was sent, delivered, bounced or complained about, and an audit log of who changed what.
From sign-up to first send in an afternoon.
Most of the waiting is DNS. The app shows you exactly which records to add and checks them for you.
Create a workspace
Sign in with Google or an email code and name your workspace.
Connect your domain
Add the DNS records we give you. We verify sending, receiving and authentication.
Bring your contacts
Import a CSV or add people through a form or the API.
Start sending
Write a sequence, pick a sending window and launch. Warm-up handles the pace.