CoolUtils Mail Viewer

Name: CoolUtils Mail Viewer
Author: AlexBuzaev75

@AlexBuzaev75

About CoolUtils Mail Viewer

Read, convert, and extract attachments from .eml, .msg, .p7m, .mim, .tnef, .vcf, .olk15 and 5 other email formats. Built into CoolUtils Mail Viewer for Windows. Activate with MailViewer.exe --mcp.

#email #eml #msg #outlook #pdf #conversion #attachments #forensics #ediscovery #windows

Basic information

Config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "mailviewer": {
      "command": "C:\\Program Files\\CoolUtils\\CoolUtils Mail Viewer\\MailViewer.exe",
      "args": [
        "--mcp"
      ]
    }
  }
}

Tools

convert a mail file to any output format using the full Mail Viewer rendering engine. PDF/DOCX output preserves embedded HTML, inline images, attachment previews, and headers.

return sender, To/CC/BCC, subject, date, RFC headers, body, and attachment metadata as JSON. Does not modify the source.

bulk-save all attachments from a message into a target folder.

Overview

What is CoolUtils Mail Viewer?

It is a Model Context Protocol server integrated with CoolUtils Mail Viewer that lets Claude, Cursor, Cline, and any MCP‑compatible AI agent read, convert, and extract attachments from email files. The server supports source formats such as .eml, .msg, .mim, .p7m, .vmbx, .tnef, .mapixml, .olk15, .vcf, .contact, and .3uc, and can output to pdf, html, txt, doc, rtf, tiff, jpg, png, bmp, emf, eml, and xps.

How to use CoolUtils Mail Viewer?

Download CoolUtils Mail Viewer from the official website (Windows, 30‑day free trial). Add a block to your MCP client configuration (Claude Desktop, Claude Code, Cursor, Cline) pointing to the MailViewer.exe path with the argument --mcp. Restart your client. All processing runs locally – no email files are uploaded.

Key features of CoolUtils Mail Viewer

Converts email files to multiple output formats
Returns full mail metadata as JSON
Extracts and saves all attachments to a folder
Preserves embedded HTML, images, and headers in PDF/DOCX
Provides three dedicated MCP tools
Requires no external API or cloud service

Use cases of CoolUtils Mail Viewer

Converting .eml or .msg invoices into searchable PDFs
Reading Outlook .msg and Apple .olk15 files in a chat interface
Batch extracting attachments from a folder of email messages
Inspecting RFC headers and sender/recipient details programmatically

FAQ from CoolUtils Mail Viewer

What email formats can it read?

It can read .eml, .msg, .mim, .p7m, .vmbx, .tnef, .mapixml, .olk15, .vcf, .contact, and .3uc files.

What output formats are supported?

Output formats include pdf, html, txt, doc, rtf, tiff, jpg, png, bmp, emf, eml, and xps.

Does it require an internet connection?

No. Everything runs locally using the CoolUtils Mail Viewer rendering engine; mail files are never uploaded.

Is there a free trial?

Yes. CoolUtils Mail Viewer offers a 30‑day free trial for Windows.

What MCP tools are available?

Three tools: convert_mail (convert to any supported output format), get_mail_info (return sender, To/CC/BCC, subject, date, RFC headers, body, and attachment metadata as JSON), and extract_attachments (bulk‑save all attachments into a target folder).