Key differences between Mailgun and Postmark
Migrating email service providers can be a large undertaking. We want to help relieve some of that stress of moving to Postmark from Mailgun. This guide will detail some of the differences and similarities between Mailgun and Postmark, as well as give some useful tips for migrating to Postmark from Mailgun.
It includes details on differences between Postmark and Mailgun’s APIs, sending outbound emails, processing inbound emails, UI differences, and webhooks. For quick reference, we have included tables where possible to equate Mailgun functionality and JSON fields to their comparable functionality and fields in Postmark.
Key differences between Mailgun and Postmark #
These are some important differences to be aware of when moving over to Postmark from Mailgun:
- Postmark does not allow anyone to send marketing or bulk email, whereas Mailgun does. If you were sending your marketing and/or bulk email through Mailgun and want to switch those over to another provider, we highly recommend using Campaign Monitor for any bulk email you need to send.
- Since Postmark does not allow bulk email (including subscription newsletters), there are no list management features available in Postmark, such as handling unsubscribes or adding unsubscribe links to your emails.
- Successfully sent messages are stored for 45 days in Postmark (including the content). Bounces and spam complaints are stored indefinitely for troubleshooting purposes.
- Postmark uses a pay as you go credits model instead of monthly billing for the previous month’s usage. See our pricing page for more details. One credit is used per email sent/received and credits never expire. Credits are purchased in advance and discounts are offered for large volume credit purchases.
- All Postmark accounts have all features. There are no differences between a Postmark account that has made a credits purchase and one that hasn’t.
- Postmark does not provide 10,000 free emails each month like Mailgun. We start you with 25,000 free credits when you create your account but you will need to purchase more credits once those are used.
- We do not recommend using dedicated IPs for most senders but do move senders to dedicated IPs at no additional charge once they reach a significantly large volume. As a result, you are never responsible for warming up an IP. We take full responsibility for managing IP addresses and warming them up.
- Postmark does not have an email validation service. You can either continue using Mailgun’s validation endpoints or use a service like kickbox.io, to replace Mailgun’s email validator.
- Postmark does not have a reseller program.