The best-written sequence is worthless in spam. Deliverability is the real game — here's how to win it.
Use dedicated sending domains (not your primary), authenticate with SPF, DKIM and DMARC, and warm mailboxes gradually. Sending volume from a cold domain is the fastest way to the spam folder.
Ramp slowly and cap daily sends per mailbox. Spread volume across multiple warmed mailboxes rather than blasting from one. Sudden spikes look like exactly what spam filters hunt for.
Modern filters weigh replies and opens heavily. Tight targeting and a relevant first line beat clever templates — a smaller, well-matched list outperforms a big cold one.
Honor unsubscribes instantly, include a real identity, and follow CAN-SPAM and regional rules. Our outbound agent Mercury runs the sequences, and Themis verifies compliance and unsubscribe handling before anything sends.
Related: Comms & Outbound · Mercury
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