Zero-Downtime ESP Migrations & Dedicated IP Warmup
Migrate between Mailchimp, Klaviyo, Brevo, HubSpot, or AWS SES without triggering spam filters, burning your sender reputation, or interrupting active revenue flows.
Why Most Platform Migrations Fail
True ESP migration is an infrastructure cutover problem, not a CSV import task. Drawing from ISP-level network management and over 500 completed email infrastructure audits, every migration is executed under strict change control to maintain parallel protocol alignment and incremental reputation transfer.
The 4-Stage Technical Migration Protocol
Pre-Cutover Hygiene & Suppression Sync
We audit historical bounce logs, complaint records, and suppression lists before any data moves. Inactive contacts (180+ days) and spam traps are cleansed to prevent immediate new-IP blacklisting.
Parallel DNS & Protocol Provisioning
Dual-DKIM selectors are provisioned alongside custom Return-Path (envelope-from) domains and RFC 9989 DMARC alignment. Both the outgoing and incoming platforms authenticate cleanly in parallel.
Algorithmic IP & Domain Warmup Pacing
Volume is throttled through a custom sending curve based on recipient mailbox provider thresholds. We lead with your most engaged subscribers to generate positive inbox signals before scaling.
Live Telemetry & Cutover Validation
We monitor Google Postmaster Tools, Microsoft SNDS, and DMARC aggregate XML telemetry in real time. Full cutover only occurs once sender reputation metrics confirm green status across major ISPs.
What Is Included in the Engagement
- Full Data Architecture Mapping: Merge tags, contact custom fields, purchase history attributes, and dynamic automation triggers mapped 1-to-1.
- Automated Flow & Webhook Replication: Cart abandonment, welcome sequences, transactional notification webhooks, and customer journey logic migrated with zero downtime.
- Dedicated DNS Configuration: Authoritative SPF, 2048-bit DKIM keys, DMARCbis RFC 9989 policies, and BIMI/MX records deployed and validated.
- Custom Warmup Calendar: Exact daily send volume schedules tailored to your list size (50k to 1M+ contacts) and target demographics.
- Post-Migration Forensic Health Check: 30-day post-cutover observability to ensure long-term inbox placement and sender score stability.
Planning an ESP Migration or Dedicated IP Setup?
Discuss your current sending volume, target platform, and migration timeline with an experienced infrastructure architect.
Direct client engagements · Serving UK, US, Canada, Europe & Global Enterprise Clients