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Mailgun + Fortress OS
Transactional email delivery and validation through an API, with deliverability tooling behind it.
Updated · 3 min read
What is the Mailgun + Fortress OS integration?
Mailgun is a transactional email service for developers, now part of Sinch. It sends, tracks and validates email through a REST API, and its deliverability tooling works on the harder problem, which is whether the message reaches an inbox instead of a spam folder.
Key takeaways
Send, track and validate email through a REST API.
Deliverability tooling addresses inbox placement, not just successful sending.
Address validation cuts bounces before a message goes out.
How does Mailgun work with Fortress OS?
Fortress OS sits underneath your stack as the operating layer. When something changes in Mailgun, Fortress picks it up and pushes it to the other systems that care. No double entry. No end-of-month reconciling. No spreadsheets stitching things together.
What data flows between the two?
The exact fields depend on the communication use case. The goal is simple: both systems show the same truth. Records, statuses, and key events stay in sync. Your team is not the human glue between them.
Who handles the setup?
Our integrations team handles documentation exchange, API keys, and end-to-end testing. Most Mailgun connections go live in a few weeks. You can request a setup any time.
Why should you connect Mailgun to Fortress OS?
A rent receipt that lands in spam generates the same phone call as a rent receipt that never sent. Deliverability is the difference, and it is the part a generic mail server handles worst.
What changes once you connect Mailgun?
Same communication tool. Different day-to-day for your team.
| Daily task | Without the integration | With Fortress OS + Mailgun |
|---|---|---|
| Keeping records in sync | Copy-paste between tabs, hope you got the numbers right. | Records match across both systems on their own. |
| End-of-month reconciling | Spreadsheet exports, manual cleanup, late nights. | Numbers already line up. Close the month, go home. |
| Onboarding new properties | Manual setup in Mailgun and every other system. | Fortress provisions the connection so new sites pick it up. |
| Answering “what’s the truth?” | Open three tabs, compare, guess which one is current. | One source of truth, kept fresh by Fortress. |
Tags
- Mailgun
- Mailgun integration
- Communication
- Fortress OS
- integration
- property management software
- affordable housing
Frequently asked questions
Quick answers about how Mailgun and Fortress OS work together. Don't see your question? Ask us →
What is transactional email?
The messages your system sends in response to something happening, like a rent receipt, a maintenance update or a password reset, as opposed to a marketing campaign.
Why does deliverability matter?
Sending a message and having it reach an inbox are different outcomes. Mailgun reports customers on its deliverability product averaging a 97.4 percent delivery rate against an industry average of 84.8 percent.
Is Mailgun part of another company?
Yes. Mailgun is part of Sinch and is sold as Sinch Mailgun.