SendEmailUnity

EmailSenderUnityCSharp.cs

using System.Net;
using System.Net.Mail;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using UnityEngine;

public class SendEmail : MonoBehaviour
{
    public string fromEmail = "yourGmailAccountFromWhereYouWantToSendEmail";
    public string toEmail   = "WhomYouWantToSendEmail";
    public string subject   = "SubjectName";
    public string body      = "Body of the email";
    public string password  = "YourGmailAccountPassword";
    // Start is called before the first frame update
    void Start()
    {
        EmailSending();
    }

    // Update is called once per frame
    void EmailSending()
    {

        MailMessage mail = new MailMessage();
        mail.From = new MailAddress(fromEmail);
        mail.To.Add(toEmail);
        mail.Subject = subject;
        mail.Body = body;
        // you can use others too.
        SmtpClient smtpServer = new SmtpClient("smtp.gmail.com",587);
        //smtpServer.Port = 587;
        smtpServer.Credentials = new System.Net.NetworkCredential(fromEmail, password) as ICredentialsByHost;
        smtpServer.EnableSsl = true;
        ServicePointManager.ServerCertificateValidationCallback =
        delegate (object s, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
        { return true; };
        smtpServer.Send(mail);

    }

}