OpenTrashmail
Self-hosted disposable email inbox with web UI, API, RSS, webhooks
OpenTrashmail is an open source, standalone “trashmail” service that includes its own SMTP server for receiving email on your domains without pre-creating mailboxes. Messages can be viewed in a web interface or consumed programmatically via JSON, RSS, and webhooks.
Key Features
- Built-in SMTP server (Python-powered) that accepts mail for configured domains
- Web UI to browse messages, view HTML/text bodies, and manage inboxes
- JSON API for listing messages, retrieving full message details, and deleting mail/accounts
- Per-address RSS feeds for reading emails in RSS clients
- Webhooks (global and per-address) with customizable JSON payloads
- Attachment handling with download support and configurable size limits
- TLS support for SMTP via STARTTLS and TLS-on-connect
- File-based storage (no database required)
- Optional access controls: shared password, allowed IP ranges, and admin view
Use Cases
- Disposable inboxes for signups, testing, and avoiding spam on primary accounts
- Automation workflows that need to ingest emails (e.g., parsing verification or 2FA emails)
- Email honeypot/catch-all style collection for diagnostics and monitoring
Limitations and Considerations
- Not a full mail platform (no IMAP/POP3 mailboxes); focused on receiving and consuming messages via UI/API/RSS
- Running an SMTP listener typically requires careful network and DNS setup and may be impacted by ISP/cloud provider port restrictions
OpenTrashmail is well-suited for homelabs and development environments that need quick, disposable inboxes and machine-friendly access to received emails. Its file-based design and multiple consumption methods make it practical for both manual inspection and automated integrations.
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Tech Stack:
Docker
Python
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