Create a custom app in you Gmail security settings. Log-in into Gmail with your account Navigate to https://security.google.com/settings/security/apppasswords In ‘select app’ choose ‘custom’, give it an arbitrary name and press generate It will give you 16 chars token. Use the token as password in combination with your full Gmail account and two factor authentication will … Read more
Just Go here : Less secure apps , Log on using your Email and Password which use for sending mail in your c# code , and choose Turn On. Also please go to this link and click on Continue Allow access to your Google account also I edit it little bit : public string sendit(string … Read more
This is actually per RFC 2821 (4.5.2 Transparency) Before sending a line of mail text, the SMTP client checks the first character of the line. If it is a period, one additional period is inserted at the beginning of the line. .Net is just storing the file in “ready to transmit” mode which means that … Read more
The SmtpClient can be used by code: SmtpClient mailer = new SmtpClient(); mailer.Host = “mail.youroutgoingsmtpserver.com”; mailer.Credentials = new System.Net.NetworkCredential(“yourusername”, “yourpassword”);
I think that if you are looking to test the SMTP it’s that you are looking for a way to validate your configuration and network availability without actually sending an email. Any way that’s what I needed since there were no dummy email that would of made sense. With the suggestion of my fellow developer … Read more
Gmail’s SMTP server requires you to authenticate your request with a valid gmail email/password combination. You do need SSL enabled as well. Without actually being able to see a dump of all your variables being passed in the best guess I can make is that your Credentials are invalid, make sure you’re using a valid … Read more
You won’t believe what fixed my problem. The Credentials property ss.Credentials = new NetworkCredential(“username”, “pass”); must be declared after ss.UseDefaultCredentials = false; So the final working code listing is SmtpClient ss = new SmtpClient(“smtp.gmail.com”, 587); ss.EnableSsl = true; ss.Timeout = 10000; ss.DeliveryMethod = SmtpDeliveryMethod.Network; ss.UseDefaultCredentials = false; ss.Credentials = new NetworkCredential(“username”, “pass”); MailMessage mm = … Read more
to send over gmail, you need to use an encrypted connection. this is not possible with telnet alone, but you can use tools like openssl either connect using the starttls option in openssl to convert the plain connection to encrypted… openssl s_client -starttls smtp -connect smtp.gmail.com:587 -crlf -ign_eof or connect to a ssl sockect directly… … Read more
The original question was asked for .NET 4, but if it helps as of .NET 4.5 SmtpClient implements async awaitable method SendMailAsync. As a result, to send email asynchronously is as the following: public async Task SendEmail(string toEmailAddress, string emailSubject, string emailMessage) { using (var message = new MailMessage()) { message.To.Add(toEmailAddress); message.Subject = emailSubject; message.Body … Read more
This is what I do: MailMessage mail = new MailMessage(from, to, subject, message); mail.IsBodyHtml = true; SmtpClient client = new SmtpClient(“localhost”); client.Send(mail); Note that I set the mail message html to true: mail.IsBodyHtml = true;