Mailboxes ready for outbound email.
Connect your own email accounts or use managed mailboxes. 17Signal sets up sending domains, warms mailboxes, rotates sends, and limits daily volume.
Calculate your sending capacity across rotated mailboxes
How 17Signal manages sending reputation
Email service providers (Google Workspace, Microsoft 365) penalize sudden bursts and spam footprints. Our orchestration layer enforces strict hygiene automatically.
Automated DNS Authentication
Managed sending domains use SPF records, DKIM signing, and DMARC policies. Return-Path and MX settings support authentication and reply handling.
Intelligent Pool Rotation
Campaigns draw from a distributed pool of secondary sending mailboxes. When one mailbox hits its daily cap, the orchestrator smoothly hands sends to the next warm sender.
Randomized Jitter & Pacing
Instead of sending batch blasts, 17Signal introduces randomized 45–180 second jitter delays between dispatches during local target business hours.
Instant Bounce Spike Quarantine
If a domain encounters an unexpected DSN failure or bounce anomaly, the system automatically pauses the mailbox and alerts you, protecting your master reputation.
The 14-Day Warmup Schedule
New mailboxes gradually scale their sending volume alongside bidirectional peer inbox interactions to establish high IP and domain reputation.
| Timeline Phase | Daily Target Volume | Operational Focus | Reputation State |
|---|---|---|---|
| Days 1–3 | 5 emails / day | Warmup handshake & baseline peer exchanges | Initialization |
| Days 4–7 | 12 emails / day | Gradual ramp + positive peer engagement | Reputation Building |
| Days 8–11 | 22 emails / day | Outreach blended with high-engagement warmup | Active Scaling |
| Days 12–14+ | 30 emails / day | Full operational cap with randomized jitter | Optimal Production |