ImprovMX forwards email for your domain to the inbox you already use, with optional SMTP for sending as your domain.
Postmark is an email delivery service for applications, with outbound sending and inbound routing to your app.
Choose Postmark for app email. Choose ImprovMX if you want domain email forwarding and sending.
Simplicity
Simple laser focused UI for email forwarding
Developer-focused platform with more moving parts
Pricing
Lower-cost fixed plans, scalable as you grow.
Volume-based pricing, generally more expensive
Free plan
Supports day-to-day domain forwarding
Best for testing due to very low-volume app emails 1
Sending volume
Monthly SMTP quotas per plan
Priced by monthly send volume
API
API manages domain, aliases and forwarding
API manages app email sending, tracking & delivery
Advanced Forwarding
Webhook only; routing logic in your app
Webhooks
Inbound webhooks
Inbound and status webhooks
Email tracking
Full email engagement tracking
Compliance
ImprovMX is GDPR compliant
Postmark is GPDR compliant
1. Postmark’s free Developer plan is capped at 100 emails per month, and they explicitly state no monthly overages are allowed on that plan so its mainly suitable for testing rather than real usage.
Questions? Reach out to us, we'd love to chat about email service providers.
Your domain deserves better email
Set up in minutes and forget about it.