Check your domain
Review SPF, DKIM, DMARC, and MX records before sending.
See the signals.
Protect your sending.
Check a draft before sending, inspect domain and IP reputation, and build a sending history with automatic warmup.
Inspect a draft
Run a spam check before sending, or inspect a signed message with its sending IP.
Monitor your reputation
Follow domain and IP blocklist signals while dedicated IPs warm up gradually.
Check a draft before you send it
Inspect content with SpamAssassin and rspamd without delivering the draft. Check signed messages with their real sending IP and blocklist signals.
Domain reputation, not only IP
Monitor domain and IP listings across Spamhaus ZEN & DBL, Barracuda, SpamCop, Mailspike, PSBL, UCEPROTECT, SURBL, and URIBL.
A pause when your IP needs attention
An affected sending IP pauses automatically on a critical listing and resumes after delisting. Protection of the last sender in a shared pool is handled separately.
A sending history built gradually
A 30-day warmup grows from 50 to 300,000 emails a day. Warmup pauses itself on high bounce or deferral rates.
BIMI support
Configure your brand’s logo for supported mailbox providers. Display and certificate requirements depend on the receiving provider.
Plan limits
API and SMTP are included in every plan. Free includes 3,000 emails per month, one domain, and three days of logs. Pro includes ten domains and 30 days of logs; Scale includes unlimited domains and 90 days of logs.
Compare plansGood to know
Verify your domain before production sending. Keep API keys and SMTP passwords on your backend. Delivery depends on content, reputation, authentication, and the receiving provider; an accepted request does not guarantee inbox placement.
Send your first email.
Your next email starts with a few lines of code.
Start building 3,000 emails / month free