Migrate from X2CRM to Mailchimp

Discovery and scoping

We audit the source X2CRM instance across all modules, extracting record counts for Contacts, Accounts, Deals, Campaigns, Activities, Tags, and Custom Fields. We inventory active X2Flow workflows with trigger type, conditions, and action sequence. We review the Mailchimp account tier (Free, Essentials, Standard, Premium), existing Audience structure, merge field configuration, and API key datacenter (for example, us21). We identify all contacts with unsubscribe status, bounce history, or multiple addresses. The discovery output is a written migration scope with object inventory, a Mailchimp audience design document, and a pre-import data quality report flagging email format issues and GDPR-sensitive records.

Data extraction and validation from X2CRM

We extract contact data from X2CRM via the REST API using application/json payloads, including all standard fields, custom fields, tag associations, account links, and unsubscribe timestamps. We validate every email address against RFC 5322, normalize phone numbers to E.164 format, deduplicate records by email address, and quarantine any hard-bounced or previously unsubscribed contacts with their original status flags preserved. We also extract Accounts as a tag-reference list, Campaigns with HTML content and audience membership, Tags as a standalone export, and Activities as a CSV. We handle X2CRM's 422 validation responses during extraction by logging the error, correcting the record, and retrying before proceeding.

Mailchimp audience preparation

We configure the destination Mailchimp Audience before any data import. This includes creating merge fields for primary account name (ACCOUNTNAME) and CRM reference ID (CRM_ID), setting GDPR-compliant unsubscribe behavior for all imported contacts, and configuring tag groups to match the X2CRM tag taxonomy. For contacts with multiple X2CRM addresses, we configure a secondary address merge field if the customer requests one. We also verify the API key datacenter matches the account's datacenter prefix to avoid 404 errors during import.

Test migration and API dry run

We run a test migration using a sample batch of 100-500 records in Mailchimp's dry-run or sandbox context where available. We validate that merge fields populate correctly, account tags apply to the correct Members, unsubscribe flags are set without sending re-engagement emails, and the API responds without 400, 415, or 422 errors. We monitor Mailchimp API response headers to confirm we are within rate limits and adjust batch sizes before the production run. Any mapping corrections identified in the dry run are applied to the migration scripts before the production migration begins.

Production migration in dependency order

We run the production migration in phases: custom fields and merge fields first, then Accounts as a tag-reference export, then Contacts with account tags applied and unsubscribe flags set, then Campaign history with audience membership preserved, and finally file attachments uploaded to Mailchimp Content Studio. Each phase emits a row-count reconciliation report against the original X2CRM export. For large contact lists, we implement batch chunking (500-1,000 records per batch) with exponential backoff on any 429 responses from Mailchimp's API. Bounced and quarantined records are not imported without explicit customer approval.

Cutover, validation, and handoff

We validate the final Mailchimp contact count against the original X2CRM export, spot-check 25-50 records for field accuracy, verify unsubscribe flags and GDPR compliance, and confirm that all Tags and Campaign history are present. We deliver a written migration report including contact totals by tag, campaign count, and any records that could not be imported with reason codes. We deliver the X2Flow Workflow Reconstruction Document and the Deals/Products/Activities CSV exports as part of the handoff package. We provide a one-week hypercare window to resolve post-migration reconciliation issues raised by the customer's team. X2Flow workflow rebuilds and post-migration admin support are outside standard migration scope and require a separate engagement.