Code conversion
Translate common send calls from SendGrid, Mailgun, Postmark, Resend, and SES into Postscale JSON.
Move your email to Postscale
Follow provider-specific guides for updating API calls, SMTP settings, webhooks, templates, and suppression lists.
Planning an EU provider move? Start with the EU email API guide.
Plan what needs to move
Map your current provider to Postscale before changing production traffic. The migration plan covers application code, receiving paths, and sender reputation.
Inbound route mapping
Replace inbound parse, routes, receipt rules, and receiving webhooks with aliases, rules, and signed webhooks.
Suppressions and sending reputation
Import suppression lists, keep domain authentication in place, and monitor delivery as you move traffic.
Choose your current provider.
Each guide includes field mappings, code examples, and a checklist for moving traffic.
SendGrid
API, SMTP, inbound, webhooks
Move from SendGrid to Postscale with endpoint mapping, inbound parse replacement, webhook conversion, suppression import, and a staged DNS cutover plan.
Replace SendGrid Mail Send with POST /v1/send.
Map categories and custom_args to Postscale tags and metadata.
Replace Inbound Parse with structured inbound email webhooks.
Mailgun
API, SMTP, inbound, webhooks
Move Mailgun sending, routes, webhooks, templates, and suppressions to Postscale with EU-hosted primary service data and a practical migration checklist.
Convert Messages API calls from multipart form data to JSON.
Replace Routes with aliases, inbound rules, and webhooks.
Move bounces, complaints, and unsubscribes before production traffic.
Postmark
API, SMTP, inbound, webhooks
Move Postmark sending, message streams, templates, suppressions, and inbound webhooks to Postscale with field mapping and a production cutover checklist.
Convert PascalCase API fields into Postscale snake_case JSON.
Record stream names in tags or metadata, and review routing and isolation requirements separately.
Keep server API token changes isolated behind one mail adapter.
Resend
API, SMTP, inbound, webhooks
Move Resend sends, hosted templates, receiving webhooks, tags, and domains to Postscale with SMTP support, inbound rules, and EU-hosted primary service data.
Convert Resend emails.send payloads to POST /v1/send.
Use SMTP relay for systems that cannot call a REST API.
Move receiving flows to inbound aliases and signed webhooks.
Amazon SES
API, SMTP, inbound, webhooks
Move Amazon SES sending, SMTP credentials, receipt-rule inbound processing, suppressions, and deliverability monitoring to Postscale with a simpler email API.
Replace SendEmail or SendRawEmail with POST /v1/send.
Swap SES SMTP credentials for Postscale SMTP relay credentials.
Replace S3 plus Lambda receipt rules with inbound webhooks.
Cut over without a blind spot.
Keep your old provider live, publish Postscale DNS in parallel, convert one mail adapter, import suppressions, then ramp by traffic percentage while monitoring delivery by ISP.
Talk through your migration