Mail Merge Toolkit review
A low-cost Outlook and Word mail merge add-in with attachments, scheduling, and encryption.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Mail Merge Toolkit is a Windows desktop add-in for Microsoft Outlook, Word, and Publisher. It is designed for individuals and organizations that need personalized email campaigns or document mail merges while staying within Microsoft Office. The software supports Outlook contacts, Excel spreadsheets, CSV files, databases, and SharePoint Lists as merge data sources. It can produce emails, PDF, DOCX, HTML, plain-text, RTF, EML, and other exported document files, with both email delivery and local file export available.
Pricing is structured around two annual per-user subscriptions. Standard costs $2.50 per user per month and includes personalized email subjects, attachment sending, personal attachments, and HTML, RTF, and plain-text messages. Professional costs $8.25 per user per month and adds personalized PDF and DOCX attachments, password-protected attachments, scheduled and batched delivery, SharePoint List data sources, digital signatures, and message encryption. A 30-day free trial is available, but there is no free plan. For teams that only need basic Outlook mail merge and attachments, Standard keeps the entry price low; Professional is the more suitable tier for controlled document delivery and security-related features.
Its main strength is the depth of Microsoft integration. Mail Merge Toolkit works with Outlook, Word, Publisher, Microsoft 365, Microsoft Exchange, SharePoint, and Google Analytics, while also supporting CC, BCC, UTM parameters, recipient-specific files, and personalized exports directly to a folder. The software has been offered since 2003 and runs locally on the user’s PC. That focus suits Windows-based Microsoft environments, but it narrows the fit for teams working on other operating systems or outside the Microsoft ecosystem. Choose it for Microsoft-centered, attachment-heavy mail merges; consider an alternative if cross-platform access is essential.
Mail Merge Toolkit pros and cons
- Where it wins
- Personalizes subjects, attachments, PDFs, and DOCX files
- Adds scheduling, delayed delivery, and batch sending
- Connects with Outlook, Word, Publisher, SharePoint, and Google Analytics
- Where it doesn't
- Runs only on Windows
- No free plan is available
- Advanced features require the Professional plan
Mail Merge Toolkit fact sheet, pricing and score →
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