Free Email Sandbox — No Signup Needed
Get an SMTP inbox in one click. Test transactional emails from your app, see them arrive in real time, inspect headers and HTML — all without ever signing up.
Spin up a temporary inbox in 1 second
Send up to 20 emails per sender every 30 minutes through our SMTP server, capture them in your private sandbox, and inspect every detail. No account required — better than Mailtrap, Mailgun, or Mailchimp's test environments.
Want unlimited inboxes, retention & a full dashboard? Create a free account →
Professional Email Delivery Platform
Fast delivery. High inboxing rates. Custom domain hosting with full SMTP & IMAP support, DNS auto-configuration, and enterprise-grade security.
Trusted by teams everywhere
One Platform, Complete Email Solution
Everything you need to send, receive, and manage professional email with your custom domain.
Email Hosting
Host professional email on your custom domain. Create unlimited accounts with full SMTP & IMAP access.
Learn moreSMTP & IMAP
Reliable email delivery with SMTP for sending and IMAP for receiving. Works with any email client.
Learn moreDNS & Security
Auto-configure SPF, DKIM & DMARC records. Enterprise-grade email authentication and encryption.
Learn moreActionable Email Insights
Monitor your email performance with real-time dashboards, delivery tracking, and detailed logs. Know exactly when your emails are delivered.
99.8%
Delivery Rate
12.4k
Emails Sent
5
Domains
DNS Verification Status
Get Started in 3 Simple Steps
From domain registration to sending your first email — everything is guided and automated.
Add Your Domain
Register your custom domain in the dashboard. We support any domain you own — no limitations.
Configure DNS
Follow our guided setup. We auto-verify MX, SPF, DKIM, and DMARC records in real-time.
Start Sending
Create email accounts and connect with any client — Outlook, Gmail, Apple Mail, or Thunderbird.
Loved by Teams Everywhere
“MailDog made it incredibly easy to set up professional email for our startup. We were sending from our domain within 20 minutes.”
Sarah Chen
CTO @ Launchpad
“The DKIM and SPF setup was automated, and our email deliverability improved immediately. Night and day difference from our old provider.”
Marcus Rodriguez
Founder @ BrightPath
“Managing email accounts across multiple domains used to be a headache. MailDog's dashboard makes it simple to manage everything.”
Emily Watson
Operations Lead @ Nextera
24/7 Expert Support
Our team of email engineers and deliverability specialists are always available to help you get the most out of MailDog.