Send email SMTP in C++ office365

[Vladimir99]

Hello,
I try to send email in C++ with SMTP server, i have specific issues with SMTP office 365.
"
Executing action CSharp OwnCode.id: fb347ae2-e0d4-4838-9dd4-4027f2709d92 Error in processing. The server response was: 5.7.3 STARTTLS is required to send mail [FR3P281CA0193.DEUP281.PROD.OUTLOOK.COM 2024-01-20T19:01:53.274Z 08DC19912129F550]


in my C macro:
int port;
int.TryParse("587", out port); //587 port
bool encryptConnection;
bool.TryParse(project.Variables["crypto"].Value, out encryptConnection);

Thanks for your help