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What is ymmapi.dll?

Part of YMMAPI Module by Yahoo!

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How is ymmapi.dll loaded?

Context menu handler - ymmapi.dll is typically associtated with identifier name of Yahoo! Mail. Windows Explorer displays a context menu for a file object when it is clicked with the right mouse button. This context menu allows various operations to be performed on the file object from within Explorer, like printing it or opening it with another program.
Shell open command - ymmapi.dll is typically associtated with identifier name of mailto with and identifier of rundll32.exe C:\Program Files1\Yahoo!\Common\YMMAPI~2.DLL,MailToProtocolHandler %1. A Shell Open Command allows for an association of a file extension and a program. This association allows an application to be run when the icon or a context menu item is clicked upon in the Windows Explorer window.
Approved shell extension - ymmapi.dll has a CLSID (globally unique identifier) of {5464D816-CF16-4784-B9F3-75C0DB52B499} with and identifier of Yahoo! Mail. When the system detects that the user is downloading an external program that runs as part of the Windows user interface, the system searches for a digital certificate or requests that the user approve the action. If you enable this policy, Windows only starts approved programs.


What is the community is seeing?What is the community is doing?
About 0.5% of all Boost users have the ymmapi.dll file.Of the 0.5% of ymmapi.dll users, 11.1% have disabled it.
Typical file (disk image) location:
C:\Program Files\yahoo!\common\ymmapi.dll

Are there other versions of YMMAPI Module?

What else is related?

What Windows OS versions does this run on?

Microsoft Windows XP (5.1.2600.196608)
Windows 7 Home Premium (6.1.7601.65536)

About Yahoo! Inc.

Yahoo was founded in 1994 by David Filo and Jerry Yang. It has since evolved into a major internet brand with search, content verticals, and other web services. More...
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File details

File name: ymmapi.dll
Publisher: Yahoo! Inc. (verified)
Name: YMMAPI Module
Description: YMMAPI Module
Version: 2004, 6, 13, 1
Product version: 1, 0, 0, 0
Size: 176.07 KB
Original file name: YMMAPI.DLL

Digital certificate

Issued to: Yahoo! Inc.
Certificate authority: VeriSign
Effective date: 8/10/2006
Expiration date: 9/3/2009

Context menu handler details

Name: Yahoo! Mail

Shell open command details

Name: mailto
Command: rundll32.exe C:\Program Files1\Yahoo!\Common\YMMAPI~2.DLL,MailToProtocolHandler %1

Approved shell extension details

CLSID: {5464D816-CF16-4784-B9F3-75C0DB52B499}
Command: Yahoo! Mail

Image hashes

MD5: 578adb898fc39a9b7cf52e8794cf1235
SHA-1: 046065aa86da85b26291239efd855443f3463891

PE image details

File packed: No
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