Hi Damian,

Based on the video you provided, there seems to be a design issue in your code, as shown in the attached screenshot:
Your n2_smtp object inherits from smtpclient, and you have written code in the OnSendFinished event of n2_smtp to capture the return value.
However, when you call the SendAsync function, you are using the n2_smtpclient object, which is an SMTPClient object, not n2_smtp object. Therefore, it will not trigger the OnSendFinished event of the n2_smtp object.

I suggest you try modifying it as follows:
1. In the Instance Variables of n2_smtp, delete code SMTPClient n2_smtpClient.
2. Replace all the “n2_smtpClient.” in the n2_smtp object with “This.” and save it.
3. When other places need to use the n2_smtp object to send emails, I suggest you declare it as Global Variable or Instance Variable and do not immediately destroy it after sending the emails.

Regards,

Ken