What's the VAC File?

Researcher:   |   Edited: December 05, 2018

Microsoft Silver

VAC File Summary

There are three file types associated with the VAC File Extension, with the most widely-observed being the IMail Server Vacation Message File format. According to our database, four distinct software programs (conventionally, Ipswitch IMail Server developed by Ipswitch, Inc.) will enable you to view these files. These files can be categorized as Data Files, 3D Image Files, or Developer Files. In the majority of cases, these files will be Data Files.

We have found VAC files on the Windows and Mac operating systems. They are both mobile and desktop device friendly. The Popularity Rating for VAC files is "Low", which means these files are not ordinarily found on an everyday user's device.

If you are having problems opening VAC files, or would simply like to learn more about the software programs and developers that are associated with them, please see the complete information contained below.

Low
File Type Popularity
7628
Ranking

/ 11690

Active

Mode

5

December

2018

Amended

Open VAC with FileViewPro

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Kinds of VAC Files

  3 known file types use this extension

Main VAC Affiliation

.VAC
Extension:.vac
Class:IMail Server Vacation Message File

The VAC file extension label obtained from the first letters of (vacation). The vac file extension is linked to Imail Server. Imail Server is an email messaging solution produced by Ipswitch, Inc. for Microsoft Windows operating system especially for small to medium businesses. The (.vac) is a suffix of the file name that contains vacation messages.

Organization: Ipswitch, Inc.
Group:Data Files
Subkey: HKEY_CLASSES_ROOT\.vac

Software Programs That Open The IMail Server Vacation Message File:


Ipswitch IMail Server by Ipswitch, Inc.

Windows

Other VAC File Associations

.VAC
Extension:.vac
Class:MikuMikuDance Accessory Settings File

The “VAC” file extension is related to the MikuMikuDance (MMD) a 3D animation software that is popular in Japan. The MikuMikuDanceis developed for Microsoft Windows operating system to create animation movies. The VAC file used to save settings for accessories such as clothing or used colors.

Organization: Yu Higuchi
Group:3D Image Files

Software Programs That Open MikuMikuDance Accessory Settings File Files:


MikuMikuDance by Yu Higuchi

Compatible with:

Windows
.VAC
Extension:.vac
Class:Oc2.316s Cakit File

The "VAC" file extension is a suffix of the label of saved information of Oc2.316s Cakit File. The Oc2.316s Cakit File is a Computer Algebra tool which contains a large group of classes for polynomial computing and provides accuracy of arithmetic to be an important toolkit for developers.

Organization: Microsoft Corporation
Group:Developer Files

Software Programs That Open Oc2.316s Cakit File Files:


macOS by Apple

Compatible with:

Mac

Microsoft Windows by Microsoft Corporation

Compatible with:

Windows

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VAC Usage


Top Web Browsers

Chrome (58.80%)
Firefox (11.05%)
Internet Explorer (9.04%)
Edge (8.46%)
Safari (3.87%)


Troubleshooting Problems Opening VAC Files


Common Problems Opening VAC Files

Ipswitch IMail Server is Not Installed

When you double-click your VAC file, you may see a dialog box from your operating system stating that it "Cannot Open This File Type". Usually, this is because you do not have Ipswitch IMail Server for %%os%% installed. Your operating system cannot associate your VAC with Ipswitch IMail Server, so double-clicking the file won't work.


Tip: When you have another program installed that you know will open your VAC, you can select it from the other programs listed (see "Show Apps").


Outdated Ipswitch IMail Server

It is possible that your version of Ipswitch IMail Server isn't able to open your IMail Server Vacation Message File file due to incompatibility. Visit the Ipswitch, Inc. website to download (or purchase) the latest version of Ipswitch IMail Server. This problem is most common when you have an older version of the software application, and your file was created by a newer version that it cannot recognize.


Tip: You can sometimes get hints about the right program version by right-clicking on the VAC file, selecting "Properties", and looking at the version information.


Summary: In either case, the majority of problems opening VAC files are related to not having the correct software application installed on your computer.


More Causes of Problems Opening VACs

Even with the correct version of Ipswitch IMail Server installed, you can still experience difficulties opening VACs. There can be other issues - unrelated to software - preventing you from opening VAC files. Issues that aren't software-related:

  • Invalid VAC file references in the Windows Registry (the "phonebook" of the Windows Operating System)
  • The VAC file description within the Windows Registry was removed
  • Incomplete or bad installation of a software application associated with the VAC format
  • Your VAC file is corrupted (issues with your IMail Server Vacation Message File file itself)
  • VAC file integrity has been compromised by malware
  • Device drivers of the hardware associated with your VAC file are corrupt or out-of-date
  • Windows has inadequate resources to open your IMail Server Vacation Message File file

Quiz: Which file extension is the oldest in existence?









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