Move beyond Mailgun delivery infrastructure. Add customer context and lifecycle logic.
Preserve the sending behavior your application depends on, then connect each message to contacts, product events, flows, and delivery evidence.
✓One stream first. Verify it, then move the rest.
Inventory before cutover
Inventory
Source material read
Rebuild
Created paused
Verify
Real inbox test
Switch
One trigger first
Destination flow
Paused until validation and explicit cutover
[ 01 / 03 ]What moves
Map every send dependency before changing the endpoint.
Inventory domains and credentials
Record authentication, regions, API call sites, routes, and ownership before rotating any sending path.
Move templates with their variables
Preserve the request contract each application call expects, then test the rendered output against real payloads.
Reconcile suppressions and callbacks
Import the records that must not receive mail and verify webhook behavior before routing production traffic.
[ 02 / 03 ]Concept map
Keep the delivery contract while changing the operating model.
Map Mailgun's sending concepts to Send & Retain messages, templates, suppressions, contacts, and events.
Delivery
Mailgun API calls
Send & Retain API or connected provider
Templates
Stored or application-owned content
Versioned templates with test sends
Safety
Separate suppression configuration
Suppression enforced in every dispatch path
Questions people ask us
Change the sending path without losing the message trail.
Map one Mailgun call site, verify its callbacks and suppressions, then move the next.