Overview

The purpose of this article is to provide a resolution when the Message Transfer Agent service is crashing with atcuf32.dll as the faulting module.  You may also notice, depending on the amount of email traffic to your FaxMaker server, the folder C:\Program Files (x86)\GFI\sinkdrop has many items in it.  

Environment

Any FaxMaker installation.

Solution

When the Message Transfer Agent service is crashing and it is verified in the Windows Event Viewer that the faulting module is atcuf32.dll, which is a BitDefender .dll file, follow the steps below to resolve this issue:

1. Using this article, add C:\Program Files (x86)\Common Files\GFI and C:\Program Files (x86)\GFI. to the BitDefender exclusions.  All of Faxmaker's system requirements can be found in the FaxMaker System Requirements article.  
   
   
2. If there is a build-up of items in the C:\Program Files (x86)\GFI\sinkdrop folder, these are usually .eml files, Create a new folder elsewhere, for this purpose, on the desktop is fine, and move all of the files from the sinkdrop folder to this new folder.  
   
   
3. Restart the Message Transfer Agent service from the services.msc and verify the service remains started. 
   
   
4. Send a new fax via email and make sure the Message Transfer Agent does not stop and the fax goes out using the FaxMaker Monitor.  
   
   
5. If the items that were in the sinkdrop folder, that were moved to the new folder created elsewhere, are faxes that need to be sent, select one item from the new folder and drop it in the sinkdrop folder and verify the fax goes out.
   
   
6. Finally, move the rest of the items from the new folder to the sinkdrop folder and ensure these faxes go out as well.  

Confirmation

After adding the FaxMaker folders to BitDefender's exclusion list, the Message Transfer Agent service will start and any built-up items in the sinkdrop folder will be sent.