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The First AfterSMTP
Client

AfterMail bridges traditional email (Gmail, Outlook, IMAP) with next-generation protocols (AfterSMTP, Mailblocks). Full-featured email client with AI assistant, protocol testing, migration tools, and blockchain-backed security.

Why AfterMail?

The first client to fully implement the AfterSMTP protocol with complete backward compatibility

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Traditional Email Integration

Works perfectly with Gmail (OAuth2), Outlook (Microsoft Graph API), and any IMAP/POP3/SMTP server. Full folder management, attachments, and familiar email workflows.

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Next-Gen AfterSMTP Protocol

DID-based identity, end-to-end encryption (X25519+AES-GCM-256), Ed25519 signatures, and AMF message format. Connect to the free msgs.global gateway or self-hosted AfterSMTP servers.

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Mailblocks Web3 Email

Proof-of-stake spam prevention with Ethereum wallet integration. Senders stake crypto to reach your inbox. IPFS storage, quarantine system, and blockchain-verified delivery receipts.

Smart Features

AI-powered productivity tools that make email faster and smarter

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AI Writing Assistant

Spell/grammar checking, writing improvement, draft generation, and tone conversion (formal/friendly). Summarize emails instantly. BYOK (Bring Your Own Key) - works with Anthropic Claude or OpenRouter.

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Smart Categorization

Automatically organize emails into 8 categories: Work, Personal, Finance, Shopping, Social, Newsletters, Promotions, Spam. AI-powered or rule-based. Learns from your corrections.

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Undo Send

10-second countdown after sending gives you time to catch mistakes. Cancel messages before they're delivered. Works with all account types.

Developer & Power User Tools

Built by developers, for developers - with professional debugging and testing tools

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Protocol Testing

Grammar testing for SMTP, IMAP, POP3 compliance. Security verification: SPF, DKIM, DMARC, MTA-STS, BIMI, ARC. Raw session debugging and interactive protocol sessions.

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Migration Wizard

Step-by-step migration from Gmail/Outlook to AfterSMTP. Bulk import thousands of messages preserving metadata. Automatic MIME → AMF format conversion.

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Message Inspector

Parse and analyze both MIME and AMF messages. View raw headers, body structure, attachments, and cryptographic signatures. Perfect for debugging and protocol development.

Protocol Comparison

Understanding the differences between traditional and next-gen email protocols

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Traditional SMTP/MIME

Identity: Email addresses
Encryption: TLS (transport only)
Signatures: DKIM (optional)
Format: Text-based MIME
Spam Prevention: Filters

AfterSMTP/AMF

Identity: DIDs (blockchain)
Encryption: E2E (X25519+AES)
Signatures: Ed25519 (required)
Format: Protobuf (binary)
Proof of Delivery: Blockchain receipt

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Mailblocks Web3

Identity: Ethereum addresses
Storage: IPFS (distributed)
Spam Prevention: Proof-of-stake
Verification: Smart contracts
Incentives: Economic spam prevention

Built on Cutting-Edge Technology

AfterMail leverages the latest in blockchain, AI, and email protocol innovation

AfterSMTP/AMF Protocol DID Identity (W3C) X25519 + AES-GCM-256 Ed25519 Signatures QUIC Transport Gmail OAuth2 API Microsoft Graph API IMAP/POP3/SMTP Ethereum Smart Contracts IPFS Distributed Storage Substrate Blockchain AI (Claude/OpenRouter) SPF/DKIM/DMARC/ARC Protobuf Messages Go + Fyne GUI

For Organizations & Developers

Open-source, extensible, and ready for enterprise deployment

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Self-Hosted AfterSMTP Gateway

Deploy your own AfterSMTP gateway for complete control over messaging infrastructure. Connect to msgs.global network or run standalone. White-label options available.

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Open Source & Extensible

Built with Go + Fyne. Full source code available on GitHub. Protocol implementations, client libraries, and comprehensive developer documentation.

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Security First

Keys stored encrypted in OS keychain (macOS Keychain, Windows DPAPI, Linux Secret Service). TLS 1.3, DANE certificate pinning, and comprehensive security testing tools.