PROX-V2

High-performance proxy scraping, checking, and SMTP testing toolkit written in Go. Builds on v1 with a new Port 25 SMTP Checker — tests whether proxies can tunnel SMTP traffic through to a mail server on port 25.

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What It Does

• Scrapes large volumes of proxies from 100+ public sources
• Validates which proxies are alive and working
• Tests whether proxies allow SMTP traffic on port 25 by connecting through the proxy to a real mail server — useful for email deliverability research and mail server connectivity testing

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Menu

Option	Feature	Description
1	Scrape Proxies	Scrape from built-in sources, a custom URL file, or both
2	Check Proxies	Validate proxies from a file using multiple check methods
3	Scrape + Check	Scrape from all built-in sources then check immediately
4	Port 25 Checker	Test SMTP port 25 connectivity through the proxy to a target mail server
0	Exit	Quit

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Features

Proxy Scraping

• 100+ built-in public proxy sources (HTTP, HTTPS, SOCKS4, SOCKS5)
• Custom URL file support
• Combined mode — built-in and custom sources together
• Configurable thread count and timeout
• Automatic deduplication
• Real-time progress bar with live stats

Proxy Checking

Four check methods:

• HTTP CONNECT — sends CONNECT to target:443, checks for 200 response (best for HTTPS proxies)
• Full HTTP Request — GET through the proxy to httpbin.org/ip (proves full traffic flow)
• TCP Socket Only — connects to the proxy port (fast, less strict)
• CONNECT + HTTP — both tests must pass (strictest, highest quality results)

Configurable CONNECT target: google.com, httpbin.org, example.com, or custom. Saves alive proxies and dead proxies to separate files.

Port 25 Checker

Connects to the proxy on its HTTP port, then tunnels to a mail server on port 25. Three check methods:

• HTTP CONNECT — sends CONNECT target:25 through the proxy (best for HTTPS proxies)
• Direct HTTP — routes request to target:25 through the proxy (for HTTP proxies)
• Try Both — CONNECT first, falls back to Direct (covers all proxy types)

Built-in SMTP targets:

• smtp.gmail.com
• smtp.office365.com
• smtp.mail.yahoo.com
• mx.zoho.com
• Custom domain

Saves passing proxies in ip:port format. Optional failed proxy export.

General

• Colorized terminal output with ASCII banner
• Live progress bars with ETA, percentage, running counts
• Formatted summary after each operation
• All output files in ip:port format, one per line
• Fully concurrent with configurable thread pools

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Requirements

• Go 1.18+
• No external dependencies — standard library only

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Installation

git clone https://github.com/krainium/proxv2.git
cd PROX-V2

Build:

go build -o prox2 prox2.go

Run:

./prox2

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Example Workflow

Full pipeline — scrape, check, test port 25:

1. Run ./prox2
2. Option 1 — scrape from 100+ sources, saves to scraped.txt
3. Option 2 — validate scraped.txt, saves alive proxies to https.txt
4. Option 4 — test https.txt for SMTP port 25 access, saves results to port25_open.txt

Or use option 3 to combine scrape and check in one step, then run option 4.

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Output Files

File	Description
scraped.txt	All unique scraped proxies
https.txt	Proxies that passed the alive check
dead.txt	Proxies that failed the alive check
port25_open.txt	Proxies that tunneled to SMTP port 25 successfully
port25_failed.txt	Proxies that failed the port 25 check (optional export)

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What Changed from v1

Feature	v1	v2
Proxy Scraping	Yes	Yes
Proxy Checking	Yes	Yes
Scrape + Check	Yes	Yes
Port 25 SMTP Checker	No	Yes
SMTP via Proxy Tunnel	No	Yes
Multiple SMTP Targets	No	Yes
Failed Proxy Export (Port 25)	No	Yes

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Built-in Proxy Sources

Pulls from 100+ public proxy lists including:

• TheSpeedX/PROXY-List
• monosans/proxy-list
• clarketm/proxy-list
• ShiftyTR/Proxy-List
• hookzof/socks5_list
• proxyscrape.com API
• proxy-list.download API
• proxyspace.pro
• And more...

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Disclaimer

For educational and research purposes only. Use responsibly and in line with applicable laws and terms of service. The author is not responsible for misuse.