Hello,
We have utilized your Mail.dll. Windows defender has started to kick out the application as a trojan Wacatac.B!ml. We are running Windows 11 and have updated windows defender definitions. Have you seen this before?
Mail.dll is definitely not a trojan.
All Mail.dll versions are green on Virus Total:
.net 6.0 https://www.virustotal.com/gui/file/4d409f8798e0fbb9eb11ab7d4700f68d038e99ac8e2232d95b8c0335c6815ddb
.net 5.0: https://www.virustotal.com/gui/file/2a3c11384b3e55517fd839dac3e48fe0c243414e6eb40caaafcbfee326b46cc6
.net 4.8: https://www.virustotal.com/gui/file/027f7e0077b79a4fed352dd3df9cd01791769c989fe600833d44adb163331111
.net 4.5: https://www.virustotal.com/gui/file/d85ec82719787862d0ec8b0ae96729c31bab5dba06be0f281707b7b6b6b0a00b
I additionally scanned it using Windows Defender with the latest definitions (as of 2022/04/19) - no threats detected.
Do you have any screenshot it actually happens?