What is an ATT file?
An ATT file is an intermediate file generated by Web forms when a user submits data using the form in a web browser. When the data is submitted using the web form, the data is stored in the ATT file and is also emailed to the designated user. The ATT files are received as an attachment to the emails in cases where the encoding type is incorrect.
Applications that can open ATT files include text editors such as Microsoft Notepad, Notepad++, and Atom.
Key Features of the ATT File Format
1. Email Attachment Encapsulation
ATT files are used to encapsulate attachment content during email transmission or storage, ensuring that files remain intact across different mail systems.
2. Metadata Preservation
In many cases, ATT files store metadata such as file name, size, encoding type, and MIME information, which helps email clients restore the original attachment correctly.
3. Compatibility with Messaging Systems
The ATT file format is commonly associated with messaging systems that rely on structured or proprietary email packaging, making it useful in enterprise environments.
4. Binary or Text-Based Storage
Depending on the source, ATT files may contain binary data or encoded text, such as Base64, to ensure safe transmission over email protocols.
5. Intermediate Processing Role
ATT files are rarely meant for direct user interaction. Instead, they serve as an intermediate format used during extraction, conversion, or migration of email data.
Key Characteristics of the ATT File Format
| Characteristic | Description |
|---|---|
| File Extension | .att |
| Primary Use | Email attachment data storage |
| Associated Systems | Email clients and mail servers |
| Content Type | : Binary or encoded text |
| Human-Readable | Typically no |
| User Interaction | Not intended for manual use |
FAQ
Q1: What is an ATT file used for?
A: An ATT file stores email attachment data used during message processing or extraction.
Q2: Can ATT files be opened directly?
A: No, they usually require an email client or specialized tool to reconstruct the original attachment.
Q3: Are ATT files the original attachments?
A: Not always; they often contain encoded or intermediate attachment data.
Q4: Are ATT files safe to delete?
A: Only if you are sure the original attachment has been properly recovered.
Q5: Where are ATT files commonly found?
A: They are typically found in email exports, archives, or legacy messaging systems.
