What is Mailofly used for?

Mailofly is a transactional email API with SDKs, SMTP endpoints, React or HTML templates and automatic SPF, DKIM and DMARC checks for sending customer notifications. It is a good fit for sending receipts and password resets from an app, and developers moving email delivery off their own servers.

Yes. Mailofly has a free plan, and paid plans start at $20 per month.

Is Mailofly open source?

No. Mailofly is proprietary (closed-source) software and can't be self-hosted. In the Email Marketing category, open-source options include Postal, Plunk and Listmonk.

What are some alternatives to Mailofly?

Mailofly competes with SendGrid, Mailgun and Postmark.

Mailofly: features, pricing and alternatives

About Mailofly

Mailofly is a transactional email delivery service for developers. You send customer notifications and receipts through a REST API or drop-in SMTP endpoints, with SDKs for Node.js, Python, Go, PHP and Dart, plus cURL examples. The site shows a short Node.js example and says it works with frameworks such as Next.js, Supabase and Remix.

It lets you build email layouts with React or plain HTML, preview responsive states and test localized content. For deliverability, it handles SPF, DKIM and DMARC verification and offers real-time email validation and proactive checks, and it describes automated failover routing and globally distributed relays for delivery.

The site has sections for features, tools, developers, comparisons, documentation and guides covering error handling, webhooks and API specifications. A pricing page exists, though no prices appear in the homepage text.

Key features

REST API and drop-in SMTP endpoints
SDKs for Node.js, Python, Go, PHP and Dart
Email templates in React or HTML
Automatic SPF, DKIM and DMARC verification
Real-time email validation
Failover routing and webhooks

Good fit for

Sending receipts and password resets from an app
Developers moving email delivery off their own servers

Tags: transactional-email; email-api; smtp; developer-tools; deliverability; email-templates

Mailofly: questions and answers

What is Mailofly used for?: Mailofly is a transactional email API with SDKs, SMTP endpoints, React or HTML templates and automatic SPF, DKIM and DMARC checks for sending customer notifications. It is a good fit for sending receipts and password resets from an app, and developers moving email delivery off their own servers.
Is Mailofly free?: Yes. Mailofly has a free plan, and paid plans start at $20 per month.
Is Mailofly open source?: No. Mailofly is proprietary (closed-source) software and can't be self-hosted. In the Email Marketing category, open-source options include Postal, Plunk and Listmonk.
What are some alternatives to Mailofly?: Mailofly competes with SendGrid, Mailgun and Postmark.