Opening MAILLOC Files

The MAILLOC file type is primarily associated with Apple Mail.

MAILLOC	File extension: MAILLOC
	File type:	Attachment Location Pointers

What is a MAILLOC file

MAILLOC files mostly belong to Apple Mail. .MAILLOC files are XML-based files used by Apple Mail on macOS to store the location of email attachments. They do not contain the attachment data itself, but rather pointers to where the actual attachment files are stored on the file system. This allows Apple Mail to manage attachments efficiently without embedding them directly within the email messages. When an email with attachments is opened, Apple Mail uses the information in the .MAILLOC file to locate and display the associated attachments.

How to open MAILLOC files

You need a suitable software like Apple Mail to open a MAILLOC file. You need a suitable software like Apple Mail to open a MAILLOC file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your MAILLOC file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a MAILLOC file directly in the browser:. Just drag the file onto this browser window and drop it.

Online MAILLOC Text Viewer

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What to Do When a .MAILLOC File Fails to Open

Because .MAILLOC files may originate from different workflows, they aren't universally openable.

Identify the Source: Receiving this from a Mac user or email archive often suggests it contains Apple Mail attachment location pointers.
Check the Header: Open the file in a text editor or hex viewer to inspect the first bytes:
- Readable text or XML suggests structured metadata.
- "PK" indicates a zipped archive.
- Binary magic bytes imply a proprietary format.
Use the Original Software: The original program is usually required; try Apple Mail, macOS TextEdit, or ask the sender if uncertain.
Use this Webpage: Drag and drop your file into our viewer to detect the format, extract readable metadata, and preview contents when possible.

Technical Data for MAILLOC File Extension

File classification:

Email Attachment Location

Related files:

cid, xml, rfc822, identity

a mailloc Attachment Location Pointer is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with MAILLOC files

Associate the MAILLOC file extension with the correct application.
Update your software that should actually open attachment location pointers. Because only the current version supports the latest MAILLOC file format. Search, therefore, e.g. on the manufacturer website after an available Apple Mail update.
To make sure that your MAILLOC file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .MAILLOC file online - secure, fast, and no downloads needed.