MailTerrier
Find the Right Email from Thousands in Seconds
Your personal email search engine for PST, MBOX, EML, and MSG files. Process gigabytes of archived emails with lightning-fast keyword search and powerful filtering capabilities.
Free for personal home use • Only $199 for commercial license
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What MailTerrier Does
MailTerrier is a specialized email search engine designed to work with email files saved on your hard drive. Unlike email clients that slow down with large archives, MailTerrier is built specifically for speed and power when working with massive email collections.
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Universal Format Support
Handles all major email formats in one application: PST, MBOX, EML, MSG, MIM, EMLX. No need for separate tools—MailTerrier works with Outlook, Thunderbird, Apple Mail, Gmail exports, and more.
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Deep Forensic Search
Search doesn't just look at subject lines—it scans email body, attachments, metadata, sender, recipient, dates, and all header information. Find what you're looking for, wherever it's hidden.
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Advanced Search Rules
Create sophisticated queries: find emails with specific words within certain proximity, exclude terms, search specific date ranges, filter by sender or recipient. Boolean operators (AND, OR, NOT) supported.
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Lightning-Fast Performance
Initial scan builds an index of your email files. After indexing, searches complete in seconds, not minutes—even across gigabytes of data. Work with large archives without waiting.
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Smart File Discovery
Point MailTerrier at a folder or let it scan your entire computer. It automatically finds all email files (PST, MBOX, EML, MSG) wherever they're hiding—even in nested subdirectories.
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Results Management
View search results in organized list with preview pane. Sort, filter, and refine results. Save searches in history. Export results list with all properties to Excel, PDF, or Word.
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Multiple Export Options
Save found emails in PDF, TEXT, TIFF, EML, or MSG formats. Print selected messages. Export metadata and properties to spreadsheets for documentation and reporting.
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Search Within Results
Narrow down results progressively. Search within previously found emails to refine your search without rescanning entire archives. Iterative search saves time.
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Search History
MailTerrier remembers all your searches. Quickly re-run previous queries or modify them. Perfect for recurring searches and investigations that span days or weeks.
Example: Complex Search Capability
Scenario: Find emails containing the words "contract" and "2019" in the body where these words are separated by fewer than two other words, but exclude any emails that contain the word "reseller" in the subject line.
MailTerrier handles this easily. While other email search tools offer only basic keyword matching, MailTerrier supports proximity search, boolean logic, and field-specific filtering—giving you forensic-grade search capabilities.
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Who Benefits from MailTerrier
MailTerrier solves critical email search challenges across multiple industries and roles. Here's how different professionals use it to save time and find crucial information:
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Legal Professionals & E-Discovery
The Challenge: Lawyers and paralegals need to find specific emails as evidence for litigation, respond to discovery requests, or prepare for depositions—often sifting through years of communications from multiple parties.
How MailTerrier Helps:
- Rapid Evidence Discovery: Quickly locate emails relevant to specific claims, contracts, or incidents from massive archives
- Keyword-Based Searches: Find all communications containing key terms, names, dates, or phrases relevant to the case
- Timeline Construction: Search by date ranges to establish sequences of events and communication patterns
- Witness Preparation: Extract all emails from or to specific individuals to prepare witnesses for testimony
- Production Efficiency: Export found emails to PDF or other formats for production to opposing counsel
- Cost Savings: Perform initial culling in-house before sending to expensive e-discovery vendors
Real-World Example: Employment discrimination case requiring review of 3 years of emails between plaintiff and 12 co-workers. Manual review would take weeks. MailTerrier found relevant communications in minutes, allowing the legal team to focus on case strategy rather than data processing.
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IT Administrators & Security Teams
The Challenge: IT professionals need to investigate security incidents, search for malicious emails, audit user communications, or recover information from decommissioned mailboxes—all while managing massive volumes of email data.
How MailTerrier Helps:
- Security Incident Response: Quickly search for phishing emails, suspicious attachments, or malicious links across all mailboxes
- User Mailbox Audits: Search former employee mailboxes for policy violations, data leaks, or intellectual property concerns
- Email Forensics: Investigate email-based attacks by searching headers, IP addresses, and routing information
- Data Recovery: Extract specific emails or information from backup PST files without restoring entire mailboxes
- Compliance Checks: Search for keywords indicating policy violations, harassment, or inappropriate communications
- Decommissioned Account Analysis: Review email archives from terminated employees without reactivating accounts
Real-World Example: Company received report of phishing campaign targeting employees. IT security team used MailTerrier to search all 500 mailbox archives for the suspicious sender address and identified 47 recipients in under 10 minutes, enabling rapid remediation before damage occurred.
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Compliance Officers & Risk Managers
The Challenge: Compliance teams must audit communications for regulatory compliance, investigate whistleblower complaints, respond to regulatory requests, and ensure adherence to corporate policies—requiring thorough email review capabilities.
How MailTerrier Helps:
- Regulatory Response: Quickly compile emails requested by SEC, FINRA, FDA, or other regulatory agencies
- Internal Investigations: Search for evidence of policy violations, ethics breaches, or misconduct
- Whistleblower Follow-Up: Investigate allegations by searching for specific terms, names, or activities mentioned in complaints
- Trade Surveillance: Monitor trading desk communications for market manipulation or insider trading indicators
- FCPA Compliance: Search for keywords related to bribery, kickbacks, or improper payments in international communications
- Policy Enforcement: Audit employee communications for compliance with acceptable use policies
Real-World Example: Pharmaceutical company received FDA inquiry about communications related to clinical trial. Compliance officer used MailTerrier to search 5 years of emails from 8 employees for trial-related keywords, compiled responsive documents in 2 days instead of 2 weeks, demonstrating proactive compliance and avoiding regulatory penalties.
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Corporate Records & Archive Management
The Challenge: Organizations maintain extensive email archives for business continuity, knowledge retention, and regulatory requirements. Accessing specific information from these archives is often time-consuming and frustrating.
How MailTerrier Helps:
- Knowledge Retrieval: Find critical business information in emails from former employees who've left the organization
- Historical Research: Locate old communications about projects, decisions, or business relationships
- Contract Discovery: Search for contracts, agreements, or commitments buried in email archives
- Vendor Communications: Retrieve correspondence with vendors or partners for dispute resolution
- Project Documentation: Find emails documenting project decisions, requirements, or approvals
- Institutional Memory: Access organizational knowledge captured in email before it's lost forever
Real-World Example: Company involved in vendor dispute needed to prove scope changes were requested by vendor. Original project team had left company years ago. Records manager used MailTerrier to search archived mailboxes, found 7 emails proving company's position, saved $400,000 in settlement negotiations.
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Personal Email Management
The Challenge: Individuals with years of accumulated emails struggle to find important personal communications, receipts, documents, or sentimental messages in massive personal archives.
How MailTerrier Helps:
- Find Important Documents: Locate tax documents, receipts, contracts, or warranties sent via email years ago
- Personal Record Keeping: Search for medical communications, insurance correspondence, or financial statements
- Email Archive Management: Organize and search through decades of personal email without cloud upload
- Sentimental Retrieval: Find old messages from friends or family for memories or special occasions
- Account Recovery: Search for forgotten usernames, passwords, or account information in old emails
🎁 Free for Personal Use: MailTerrier is completely free for home personal use. Only commercial use in business environments requires a license.
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What Our Users Say
We've been using Mail Terrier for a legal matter to search outlook email by keyword and are happy with the results. It works fast and is powerful enough for a complicated macro task. Highly recommend this app for key word search.
— Wilf Schreiber, Attorney
I had to find all emails related to a particular case for the judge and opposing counsel. I would not be able to do that without Mail Terrier. Manual email search by keyword would take hours. It scanned my 1GB PST file and produced the list of necessary emails in minutes! Thank you very much.
— Chaow, Dong Design, Thailand
Join hundreds of legal professionals, IT administrators, and compliance officers who have transformed their email search workflows with MailTerrier. Stop wasting hours searching manually—let MailTerrier do the heavy lifting while you focus on what matters.
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Simple, Transparent Pricing
Commercial License
$199.00
One-time purchase • Lifetime license • No subscription
Includes:
- ✓ Full access to all features
- ✓ Support for PST, MBOX, EML, MSG, MIM, EMLX formats
- ✓ Advanced search with proximity and boolean operators
- ✓ Export to PDF, TIFF, TEXT, EML, MSG
- ✓ Search history and saved queries
- ✓ Multiple export and printing options
- ✓ Email technical support
- ✓ Free updates and bug fixes
- ✓ 30-day money-back guarantee
🎁 Free for Personal Use
MailTerrier is completely free for personal, non-commercial use at home. Only businesses and organizations using MailTerrier for commercial purposes need to purchase a license.
Try MailTerrier free for 30 days with full functionality. No credit card required. No automatic billing. Evaluate with your real data before purchasing.
Ready to Find Your Emails Faster?
Download MailTerrier today and experience the difference. Search gigabytes of email in seconds, not hours.
Windows compatible: 2000/2003/Vista/7/8/10/11/Citrix
30-day free trial • Free for personal use • $199 for commercial license