Hi, you should use regsvr32 to register EASendMailObj.dll, but not EASendMail.dll.

In windows vista/7/8 or later version, you MUST open DOS command by "run as administrator", otherwise, regsvr32 will be failed.

To start a command prompt as an administrator

Click Start, click All Programs, and then click Accessories.
Right-click Command prompt, and then click Run as administrator.
If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.


To start a command prompt as an administrator (alternative method)

Click Start.
In the Start Search box, type cmd, and then press CTRL+SHIFT+ENTER.
If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.

If you want to distribute/deploy without EASendMail installer.
1. copy easendmailobj.dll to destination machine. (run-time file of EASendMail ActiveX Object)
2. run "Regsvr32 [path]\easendmailobj.dll" under dos prompt. (register EASendMail ActiveX Object as com object)

I also suggest that you use manifest file like this:
https://www.emailarchite...ail/sdk/?ct=object_reg_a

It doesn't require ActiveX/COM registration.

It seems you don't have EASendMailObj.dll, please download the
https://www.emailarchite.../download/easendmail.exe

and install it on your machine, the DLL will be installed and registered automatically.