Email Validation Tool

Brief Overview

Applications_and_benefits

MaiChe is a professional-grade command-line email validation tool built with Go for exceptional performance and accuracy. It validates email addresses through multiple verification stages—syntax checking, domain/MX record verification, and SMTP mailbox validation—without sending actual emails. Perfect for businesses needing to maintain clean email lists, reduce bounce rates, and protect sender reputation.

Key Benefits

  • 95%+ validation accuracy through multi-stage verification
  • Process 10,000+ emails per hour with concurrent processing
  • Zero emails sent - SMTP verification without spam risk
  • Comprehensive detection of invalid, role-based, and disposable emails
  • Enterprise-ready with proxy support, resume capability, and detailed analytics

Available Packages

Basic Package - Essential validation for small lists up to 10,000 emails

  • Core validation features (syntax, domain, MX, SMTP)
  • CSV input/output support
  • 10 concurrent workers
  • 3-day delivery

Standard Package - Professional features for growing businesses

  • Everything in Basic plus:
  • Single proxy support
  • SQLite database for history tracking
  • Resume capability for interrupted jobs
  • Recheck failed emails
  • Up to 50,000 emails
  • 6-day delivery

Premium Package - Enterprise-grade solution

  • Everything in Standard plus:
  • Multiple proxy rotation
  • Advanced performance optimization
  • Detailed analytics and reporting
  • Up to 100,000 emails
  • 10-day delivery

Advanced Package (Custom Pricing) - Tailored enterprise solutions

  • Custom validation rules
  • REST API or RPC service mode
  • Docker containerization
  • External database integration
  • Custom reporting dashboards
  • Dedicated support

Note: Pricing details for premium packages and custom features are available at “I will build an enterprisegrade email validation cli tool”.

Verify your email list

Detailed Overview

What is MaiChe?

MaiChe is a high-performance email validation command-line interface (CLI) tool engineered to solve one of the most persistent challenges in digital marketing: maintaining clean, deliverable email lists. Built with Go programming language, MaiChe leverages concurrent processing and intelligent resource management to validate email addresses at scale while maintaining exceptional accuracy.

Unlike simple syntax checkers or basic validation services, MaiChe performs deep verification through actual SMTP conversations with mail servers, confirming not just that an email address is properly formatted, but that the mailbox actually exists and can receive mail—all without sending a single email.

The Business Case for Email Validation

Every year, approximately 22.5% of email addresses become invalid due to job changes, abandoned accounts, or deactivated domains. For businesses relying on email marketing, this decay translates into:

  • Financial losses from sending to non-existent addresses
  • Damaged sender reputation leading to spam folder placement
  • Skewed analytics making campaign performance difficult to measure
  • Potential blacklisting from excessive bounce rates

MaiChe addresses these challenges by providing enterprise-grade validation that goes beyond basic checks to ensure your emails reach real, engaged recipients.

How MaiChe Works

1. Multi-Stage Validation Pipeline

MaiChe processes each email through a sophisticated validation pipeline:

Syntax Validation

  • RFC 5322 compliance checking
  • Local part and domain structure validation
  • Special character and length verification
  • Edge case handling (quoted strings, escaped characters)

Domain Verification

  • DNS lookup for domain existence
  • MX record checking for mail capability
  • Intelligent caching to reduce redundant lookups
  • Custom DNS server support for restricted environments

SMTP Verification

  • Establishes connection with target mail server
  • Performs EHLO/HELO negotiation
  • Executes MAIL FROM and RCPT TO commands
  • Analyzes server responses to determine mailbox status
  • No actual email delivery—completely safe

Intelligence Layer

  • Role-based email detection (admin@, support@, etc.)
  • Disposable email identification
  • Catch-all domain detection
  • Pattern analysis for suspicious addresses

2. Performance Architecture

MaiChe’s architecture prioritizes speed without sacrificing accuracy:

  • Concurrent Processing: Configurable worker pools process multiple emails simultaneously
  • Smart Rate Limiting: Per-domain throttling prevents server blocks while maximizing throughput
  • Connection Pooling: Reuses SMTP connections for efficiency
  • Streaming Processing: Handles files of any size without memory constraints

Real-World Use Cases

Bulk email verifier

E-commerce Email List Cleaning

An online retailer with 500,000 customer emails uses MaiChe quarterly to clean their list before major promotional campaigns. Results:

  • Reduced bounce rate from 12% to 0.8%
  • Improved deliverability by 25%
  • Saved $3,000 per campaign in ESP costs
  • Increased open rates by 18%

SaaS User Onboarding

A B2B SaaS platform integrates MaiChe to validate emails during user registration:

  • Catches typos before account creation
  • Reduces support tickets by 40%
  • Improves trial-to-paid conversion by 15%
  • Prevents fake account creation

Marketing Agency List Management

A digital marketing agency managing 50+ client campaigns uses MaiChe to:

  • Validate lists before importing to ESP
  • Provide list quality reports to clients
  • Maintain sender reputation across all accounts
  • Reduce client churn through better campaign performance

Data Broker Quality Assurance

A B2B data provider validates all email lists before delivery:

  • Ensures 95%+ deliverability guarantee
  • Reduces refund requests by 80%
  • Builds trust through transparent quality metrics
  • Commands premium pricing for verified data

Package Details and Features

MaiChe is a rock email validation cli tool

Basic Package - Essential Validation ($50)

Perfect for small businesses, startups, or individual marketers who need reliable email validation without complexity.

Features:

  • Process up to 10,000 emails
  • Core validation pipeline (syntax, domain, MX, SMTP)
  • CSV file input/output
  • 10 concurrent workers for fast processing
  • Rate limiting to respect server limits
  • Console and file logging
  • Automatic retry on temporary failures
  • Summary statistics report

Use Cases:

  • Monthly newsletter list cleaning
  • E-commerce customer database maintenance
  • Event registration validation
  • Small campaign preparation

Sample Command:

maiche -i customers.csv -o validated.csv

Standard Package - Professional Features ($150)

Designed for growing businesses with larger lists and more sophisticated needs.

Additional Features:

  • Process up to 50,000 emails
  • Single proxy support for enhanced deliverability testing
  • SQLite database for validation history
  • Resume capability for interrupted jobs
  • Recheck specific statuses (retry failures)
  • Enhanced logging with rotation
  • Multiple output formats

Use Cases:

  • Regular list maintenance for medium-sized businesses
  • Agency client list validation
  • CRM data quality management
  • A/B testing list preparation

Sample Commands:

# Initial validation with proxy
maiche -c config.yaml -i large_list.csv -o results.csv

# Recheck previously failed emails
maiche -i large_list.csv -o results.csv -r "invalid,timeout"

Premium Package - Enterprise Solution ($300)

Full-featured solution for organizations requiring maximum performance and reliability.

Additional Features:

  • Process up to 100,000 emails
  • Multiple proxy rotation with health monitoring
  • Advanced performance optimizations
  • Detailed analytics dashboard
  • Custom reporting capabilities
  • Priority support

Advanced Capabilities:

  • Round-robin, random, or least-used proxy strategies
  • Automatic proxy failure detection and recovery
  • Real-time validation metrics
  • Historical trend analysis
  • Export to multiple formats (CSV, JSON, Excel)

Use Cases:

  • Enterprise email marketing operations
  • Large-scale data cleansing projects
  • Multi-client agency operations
  • Email service provider integration

Advanced Package - Custom Enterprise (Custom Pricing)

Tailored solutions for organizations with specific requirements beyond standard packages.

Potential Customizations:

  • REST API/RPC Service Mode: Transform MaiChe into a microservice
  • Custom Validation Rules: Industry-specific or company-specific validation logic
  • External Database Integration: Connect to PostgreSQL, MySQL, or custom databases
  • Docker Containerization: Easy deployment in cloud environments
  • Advanced Analytics: Custom dashboards and reporting
  • Workflow Integration: Connect with existing tools and processes

Example Implementations:

  • Financial services company requiring compliance-specific validation
  • Healthcare provider needing HIPAA-compliant processing
  • Global enterprise requiring multi-region deployment
  • ESP requiring white-label validation service

Technical Specifications

Performance Metrics:

  • Process 10,000+ emails per hour on standard hardware
  • 99%+ syntax validation accuracy
  • 95%+ SMTP validation accuracy
  • Memory usage: ~50MB for 100,000 email processing
  • Configurable concurrency: 1-100+ workers

System Requirements:

  • Operating Systems: Windows, macOS, Linux
  • Memory: 512MB minimum, 2GB recommended
  • Storage: 100MB for application + data storage
  • Network: Stable internet connection for SMTP validation

Security & Compliance:

  • No email content accessed or stored
  • Data processed locally - never leaves your infrastructure
  • Configurable logging for audit trails
  • GDPR, CCPA, and LGPD compliant architecture
  • Optional encryption for sensitive operations

Implementation Process

  1. Quick Start (5 minutes)
    • Download appropriate binary for your OS
    • Prepare CSV file with email addresses
    • Run basic validation command
    • Review results
  2. Configuration (15 minutes)
    • Create configuration file for advanced settings
    • Set up logging preferences
    • Configure worker count and rate limits
    • Test with sample data
  3. Production Deployment (30 minutes)
    • Set up database for history tracking (Standard+)
    • Configure proxy settings if needed
    • Create scheduled jobs for regular validation
    • Establish monitoring and alerting

ROI and Business Impact

Immediate Benefits:

  • Reduce email sending costs by 15-30%
  • Improve deliverability rates by 20-40%
  • Decrease bounce rates to under 2%
  • Increase engagement metrics by 10-25%

Long-term Value:

  • Protect sender reputation and domain authority
  • Improve email marketing ROI
  • Better customer data quality
  • Reduced support overhead from bounced emails

Support and Future Development

All packages include:

  • Comprehensive documentation
  • Step-by-step implementation guide
  • Email support for technical questions
  • Regular updates for disposable domain detection

Planned Enhancements:

  • Machine learning for predictive validation
  • Blockchain integration for validation certificates
  • Edge deployment for distributed processing
  • Advanced API rate limit management

Getting Started

Choose the package that best fits your needs:

  • Basic: For lists under 10,000 emails with standard validation needs
  • Standard: For growing businesses needing history and proxy support
  • Premium: For high-volume operations requiring maximum performance
  • Advanced: For custom requirements and enterprise integration

Ready to improve your email deliverability and protect your sender reputation? MaiChe provides the professional-grade validation your business needs to succeed in email marketing.