Glossary · Marketing, CRM & Growth
Mailgun
Overview
What Mailgun is
Mailgun is an email delivery platform aimed at developers and product teams. Instead of sending mail from your own server, your application calls Mailgun's API (or SMTP relay) to deliver messages, such as password resets, receipts, order updates, and marketing sends, while Mailgun manages the sending infrastructure, IP reputation, and retries behind the scenes.
Key features and how it works
Core capabilities include transactional and bulk sending, inbound email routing that parses replies into your app, real-time analytics on deliveries, opens, and bounces, and email address validation to clean lists before sending. Mailgun also guides SPF, DKIM, and DMARC setup on your domain, which authenticate your mail and help keep it out of spam folders.
How a full-service agency applies it
We reach for Mailgun when a custom app or automation needs reliable programmatic email, for example wiring it into GoHighLevel automation flows or a backend that must notify users instantly. Much of the value is deliverability work: warming a sending domain, configuring authentication records, and monitoring bounce rates so important messages actually land in the inbox.
Where we use it
Related Zen in Tech services
How our team puts Mailgun to work in real projects.
FAQ
Mailgun — common questions
What is Mailgun used for?
Mailgun is used to send application-generated email at scale, including transactional messages like password resets, receipts, and alerts, plus bulk campaigns, through an API or SMTP, with tracking and deliverability tooling.
Mailgun vs SendGrid?
Both are developer-focused email APIs with similar core features. Mailgun is often favored for its inbound routing, validation, and developer-friendly API; SendGrid offers a more built-out marketing campaign UI. The right pick depends on whether you need marketing tooling or pure transactional delivery.
How much does Mailgun cost?
Mailgun uses tiered, volume-based pricing with a limited free or trial allotment, then monthly plans priced by the number of emails sent and features like validations and dedicated IPs. Costs scale with send volume.
Need Mailgun done right?
Book a free consultation and we’ll map the fastest, most cost-effective path for your project.
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