AI-powered cold email with deliverability protection.

Superkabe is built for outbound-led revenue teams, agencies, and founders running cold email at scale. It fits teams that want one platform to write and send sequences (instead of piecing together a copy tool, a sender, and a deliverability monitor) while keeping multi-mailbox, multi-domain infrastructure healthy long-term.

Traditional cold email platforms focus on sending and sequencing; deliverability is typically a dashboard you glance at after the damage is done. Superkabe is the AI cold email platform with deliverability protection built directly into the send pipeline — every send passes through SMTP transcript capture, DSN parsing, DNSBL + Postmaster reputation lookups, and the auto-pause + 5-phase healing state machine before it leaves. Sending and protection are one product, not two. Migrating off another platform? Use the one-time import to bring your campaigns, sequences, leads, and mailbox metadata across in a single click.

Superkabe sends from your own mailboxes — Google Workspace and Microsoft 365 via OAuth, or any SMTP provider with encrypted credentials (Zapmail, Scaledmail, MissionInbox, custom workspaces, and more). You connect mailboxes once; Superkabe handles authentication, rotation, ESP-aware routing, and the deliverability protection layer for every send.

AI powers sequence generation (multi-step drafts from a short ICP brief), variant testing (A/B subject lines and bodies that promote the highest-performing copy automatically), and ESP-aware routing (matching each lead to the mailbox most likely to reach their inbox). More AI capabilities — reply categorization and send-time optimization — are rolling out continuously.

Domain burnout happens when sustained high bounce rates or complaints permanently damage a sender reputation. Superkabe prevents it by monitoring every bounce in real-time, auto-pausing mailboxes at configurable thresholds, gating entire domains when aggregate risk is critical, and enforcing a five-phase graduated recovery (quarantine → restricted-send → warm-recovery → healthy) before full sending resumes.

Yes. Every lead runs through syntax, MX, disposable-domain, and catch-all checks before a send. Risky leads get an additional verification pass via the MillionVerifier API on Growth and Scale plans. Invalid emails are blocked before they touch the sender — not after the bounce is recorded.

ESP-aware routing classifies the recipient's mail provider (Gmail, Microsoft 365, Yahoo, other) and selects a sending mailbox with the best historical inbox placement for that ESP. A Gmail recipient is more likely to be sent from a Gmail mailbox with proven Gmail-to-Gmail deliverability, and so on. This increases inbox rates versus naive round-robin mailbox rotation.

Yes. Superkabe supports unlimited mailboxes and domains per organization — Google Workspace, Microsoft 365, or any SMTP infra provider (Zapmail, Scaledmail, MissionInbox, and others). Each domain is monitored and protected independently so issues on one domain never cascade to others.

Yes, for domains with moderate reputation damage. Superkabe runs a graduated recovery workflow: it halts all sending, identifies the root cause, waits for ISP scoring models to register the pause, then re-warms the domain at reduced volume with tighter monitoring. Severely blacklisted domains may need to be replaced.

No. Superkabe is a cold email sending and protection platform, not a warmup service. Warmup tools generate synthetic engagement to build initial reputation. Superkabe protects and optimizes live sending — monitoring bounce rates, ESP placement, and mailbox health during real campaigns. The two are complementary and commonly used together.

Domain burnout is permanent damage to a sending domain's reputation caused by sustained high bounce rates or spam complaints. Once burned, inbox placement drops dramatically and is difficult to recover without replacing the domain — which is why Superkabe's protection layer exists to prevent the compounding damage before it becomes irreversible.

Mailbox fatigue is the gradual degradation of a single sender address's reputation from over-sending. Symptoms include rising soft-bounce rates, falling open rates, and increasing spam-folder placement. Superkabe detects fatigue early and automatically pauses the mailbox while redistributing traffic to healthy senders.