public SendMail(SmtpServer smtpServer)
{
smtpClient = new SmtpClient(smtpServer.Host, smtpServer.Port)
{
Timeout = 180000,
DeliveryMethod = SmtpDeliveryMethod.Network,
EnableSsl = smtpServer.Ssl,
UseDefaultCredentials = !smtpServer.RequiresAuthentication,
Credentials = smtpServer.RequiresAuthentication ?
new NetworkCredential(smtpServer.Username, smtpServer.Password) :
CredentialCache.DefaultNetworkCredentials
};
smtpClient.SendCompleted += (_, e) => { EndSending((MailMessage)e.UserState, e.Error); };
smtpClient.ForceChangeIfNeeded(smtpServer);
SupportAsync = smtpServer.SupportAsync;
}