x011/smtp-tunnel-proxy

Health v2 · maintenance only

Adoption not part of the score

1782 stars · 163 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A Python-based covert tunneling tool that disguises TCP traffic as SMTP email sessions to evade Deep Packet Inspection firewalls. It exposes a local SOCKS5 proxy on the client and relays traffic through a TLS-encrypted, SMTP-mimicking tunnel to a server on a VPS.

Use cases

• bypass DPI firewalls blocking VPN traffic
• tunnel arbitrary TCP traffic through networks that only allow email
• get a SOCKS5 proxy that looks like SMTP email traffic
• circumvent censorship in restrictive networks
• route browser traffic through a covert encrypted tunnel
• evade network traffic filtering at work or school

When to choose

• you need to evade deep packet inspection that detects VPN or TLS proxy patterns
• you want a standard SOCKS5 interface usable by any application
• you need multi-user support with per-user keys and IP whitelists
• you can run a server on a VPS with port 587 open

When to avoid

• you need a general-purpose VPN with full system-level traffic routing
• your network actually inspects SMTP content or blocks port 587
• you need high-throughput bulk data transfer with minimal latency
• you cannot obtain a domain name for TLS certificate verification

Facets

cli-tool · maturity active

proxy cryptography networking security privacy censorship-circumvention privacy networking security windows python cli cross-platform covert-tunnel dpi-evasion socks5-proxy smtp-masquerade tls anti-censorship linux macos

Member repositories

For agents

markdown · JSON · MCP: product_card(name="x011/smtp-tunnel-proxy")