Cold outreach engineered for primary inbox delivery.
Eliminate burned domains and shared spam pools. Kaysid runs entirely on your own VPS with humanized 300–360s velocity pacing, domain-aligned RFC Message-IDs, Gmail dark-mode CSS bulletproofing, and automated IMAP bounce scanning.
B2B Tech Solutions Q1
- Zero X-Mailer spam tags
- RFC Domain-Aligned ID
- .gmail-bg-fix Dark Mode
- IMAP Bounce Auto-Prune
Engineered from real outreach battlegrounds.
Four battle-tested mechanisms designed to bypass Gmail and Outlook spam algorithms without third-party vendor lock-in.
Randomized 300–360s Velocity Pacing
Traditional cold tools send in robotic 10-second bursts that trigger Gmail’s velocity rate-limiters. Kaysid enforces randomized 5 to 6 minute delays to perfectly mirror organic human typing and sending patterns.
Strict RFC Domain Alignment
Eliminates generic X-Mailer fingerprints. Kaysid dynamically generates domain-aligned RFC Message-IDs matching your exact sending mailbox, ensuring 100% DKIM and DMARC identifier alignment.
Gmail & Outlook Dark-Mode Defense
Mobile Gmail and Outlook invert dark email headers into unreadable gray washes. Kaysid ships with battle-tested .gmail-bg-fix, [data-ogsc], and MSO VML conditional blocks to guarantee crisp visual contrast.
Automated IMAP Bounce Detection
Scans your mailbox via IMAP for 15+ non-delivery report (NDR) keywords (`550 5.1.1`, `User unknown`, `Mailbox full`). Extracts failed recipient addresses and auto-prunes contacts so your sender reputation remains untarnished.
Generic SaaS vs. Kaysid Protocol
Why paying $100+/month for third-party outreach tools often damages your domain deliverability.
| Feature | Traditional Cloud SaaS | Kaysid Engine |
|---|---|---|
| Hosting & Control | Shared multi-tenant cloud server | 100% Self-Hosted on your VPS |
| Sending Velocity | Burst sending (trips spam filters) | Randomized 300–360s human delays |
| RFC Message-ID | Third-party server ID (fails DMARC) | Domain-aligned RFC identifier |
| Dark Mode Handling | Unstyled HTML inverts in Gmail | .gmail-bg-fix & MSO VML blocks |
| Bounce Processing | Manual CSV uploads after the fact | Automated IMAP background scanner |
| Monthly Subscription | $79 – $250/mo per seat | $0 / Free (Self-Hosted Docker) |
Ready to deploy your outreach engine?
Spin up your private workspace on your VPS in minutes. Zero third-party fees, zero data tracking, 100% primary inbox deliverability.