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CloudMailin
What it is
CloudMailin receives inbound email, parses it, and delivers the message to a web application through an HTTP POST webhook. Messages can arrive as JSON, multipart form data, or raw text, and attachments can be forwarded to a webhook or stored in Amazon S3, Azure Storage, or Google Cloud Storage. The service also sends transactional email through an API or SMTP relay, with tools for spam checking, link and open tracking, bounce handling, reporting, tagging, and priority queues. Inbound delivery history is available for 30 days with full-text search and details about errors and retries; inbound metadata is retained for 60 days. CloudMailin says its inbound service works with any language or framework, including Node.js, Python, Ruby, PHP, Go, Rust, TypeScript, Java, and C#. The free plan costs nothing and includes 10,000 emails per month with a 512KB per-message limit. Starter costs $25 a month and lists 10,000 emails and a 2MB per-message limit. CloudMailin was founded in 2010 and is available through the web and an API.
For and against
For
- Accepts JSON, multipart form data, or raw text
- Attachments can go to webhooks or cloud storage
- Includes inbound delivery history and error details
- Supports API and SMTP relay for outbound mail
Against
- Free plan limits messages to 512KB each
- Free plan includes 10,000 emails per month
- Inbound history is available for 30 days
The verdict
CloudMailin combines inbound email routing with outbound transactional sending and offers a free plan. Compare its message-size and monthly-volume limits with your needs.
Who it suits
It suits developers who need inbound email delivered to an application webhook, or transactional email sent through an API or SMTP relay. The free plan has a monthly volume and message-size limit.
Plans and prices
Free Plan
10,000 emails/mo · 512KB per message · No card required
Read 5 Oct 2026 · cloudmailin.com
Starter
10,000 emails/mo · 2MB per message · Full-text search
Read 5 Oct 2026 · cloudmailin.com
Professional
20,000 emails/mo · 10MB per message · Full-text search · 150GB/mo data transfer
Read 5 Oct 2026 · cloudmailin.com
Premium
40,000 emails/mo · 50MB per message · Full-text search · 400GB/mo data transfer
Read 5 Oct 2026 · cloudmailin.com
Corporate
100k — 7M emails/mo · 50MB per message · Full-text search
Read 5 Oct 2026 · cloudmailin.com
Dedicated
Dedicated cluster · Higher throughput · Full control
Read 5 Oct 2026 · cloudmailin.com
On the record
- Attachments
- Email attachments can be sent to a webhook or stored in Amazon S3, Azure Storage, or Google Cloud Storage.cloudmailin.com · read 5 Oct 2026
- Company
- CloudMailin is a product of Dynamic Edge Software Ltd, registered in England and Wales as company 7444971.cloudmailin.com · read 5 Oct 2026
- Delivery tracking
- The inbound service stores 30 days of delivery history with full-text search and details of errors and retries.cloudmailin.com · read 5 Oct 2026
- Encryption and login
- The security policy says sending email requires TLS, data is encrypted at rest where possible, and accounts can use 2FA or Google and GitHub OAuth.cloudmailin.com · read 5 Oct 2026
- Formats
- Inbound messages can be delivered as JSON, multipart form data, or raw text.cloudmailin.com · read 5 Oct 2026
- Languages
- The inbound service says it works with any language or framework and names Node.js, Python, Ruby, PHP, Go, Rust, TypeScript, Java, and C# as examples.cloudmailin.com · read 5 Oct 2026
- Outbound email
- CloudMailin also sends transactional email through an API or SMTP relay.cloudmailin.com · read 5 Oct 2026
- Outbound features
- Outbound features include spam checking, link and open tracking, bounce handling, reporting, tagging, and priority queues.cloudmailin.com · read 5 Oct 2026
- Plan limits
- The pricing page lists 10,000 monthly emails and 512KB per message for free, and says all paid plans include custom domains, catch-all receiving, cloud attachment storage, and delivery status reports with API access.cloudmailin.com · read 5 Oct 2026
- Product
- CloudMailin receives and parses email, then delivers it to a web application as an HTTP POST webhook.cloudmailin.com · read 5 Oct 2026
- Regional processing
- Inbound data is processed in the region where received, which by default may be the EU, US, or Asia Pacific, and a specific region can be selected via DNS records.cloudmailin.com · read 5 Oct 2026
- Retention
- The security policy states that inbound metadata is retained for 60 days, while the product page describes 30 days of delivery history.cloudmailin.com · read 5 Oct 2026
- Security
- CloudMailin says its security program is aligned with ISO 27001 and that it has completed a SOC 2 Type 2 examination; reports are available to customers and prospects under NDA.cloudmailin.com · read 5 Oct 2026
