An oas file extension is related to the Microsoft Outlook Attachment Sniffer - a little utility for Outlook used to remove attachments from e-mails. An oas file stores link to e-mail attachment.

There is one other file type using
the OAS file extension!

empty icon.oas - Fujitsu OAS document

Detailed description

Software that open oas file

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OAS file extension - Microsoft Outlook Attachment Sniffer data

What is oas file? How to open oas files?

File type specification:

Email related data file type icon Email related data file type

The oas file extension is used for add-ins for Microsoft Outlook, a personal information manager, which is part of Microsoft Office, developed by Microsoft Corporation.

The oas files are plug-ins created by Outlook Attachment Sniffer utility. Outlook attachment sniffer is a little utility that removes attachment from Outlook's emails and replaces them by a link to as oas file.

For example a file attached to an email with the name MYFILE.XLS would be removed from the email and replaced by a link called MYFILE.OAS. The original attachment is then saved in an external folder.

Updated: April 15, 2024

The default software associated to open oas file:

Outlook Attachment Sniffer  Microsoft Windows software

Company or developer:
rsbr Software

Outlook Attachment Sniffer is a powerful Outlook Add-In, which allows you to deal with specific tasks on e-mails, either on selected e-mails or on complete Outlook folders, as well as automatically on incoming e-mails.

Help how to open:

Double click on *.oas file in the Outlook message.

How to convert:

Conversion to other formats is not possible.

List of software applications associated to the .oas file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open oas file, edit oas file, convert oas file, view oas file, play oas file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting oas files.

Programs that can create oas file - Microsoft Outlook Attachment Sniffer data

Programs supporting the exension oas on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Outlook Attachment Sniffer for create oas file action.

Microsoft Windows:

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