How can I send email in C#?

Question

1.00/5 (1 vote)

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MailMessage mail = new MailMessage();
     mail.From = new MailAddress("from@gmail.com");
     mail.To.Add("to@gmail.com");
     mail.Subject = "Hello World";
     mail.Body = "<h1>Hello</h1>";
     mail.IsBodyHtml = true;
     mail.Attachments.Add(new Attachment("C:\\report.txt"));

     using (SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587))
     {
         smtp.Credentials = new System.Net.NetworkCredential("from@gmail.com", "password");
         smtp.EnableSsl = true;
         smtp.Send(mail);
         MessageBox.Show("Message sent");
     }

What I have tried:

Above code worked fine in my own laptop, but when I used it in networked PC (as a simple user, not admin),
I faced this error

ystem.Net.Mail.SmtpException: Failure sending mail. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 64.233.162.109:587

Posted 26-Jan-17 23:04pm

Little@Knight

Updated 26-Jan-17 23:10pm

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Comments

F-ES Sitecore 27-Jan-17 5:52am

This is a network issue, maybe that port is blocked on your firewall. Google the error message for possible solutions, sending email through gmail is one of the most frequently asked questions, every problem has already been solved numerous times if you google.

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Afzaal Ahmad Zeeshan · Accepted Answer · 2017-01-26T23:10:00

Your code looks fine to me, and it should send the email (and of course, should connect to the server), did you try connecting through the default TCP port for SMTP communication? That is 25, consider trying that one out,

using (SmtpClient smtp = new SmtpClient("smtp.gmail.com", 25))

Other than that, only a few things to consider:

1) Is SMTP enabled in the gmail settings?
2) Is firewall blocking your communication to that IP address/port from your application. This can really matter a lot.
3) Is Google permitting your account to communicate, sometimes I have also found that Google doesn't allow specific applications to use SMTP services.

Other than that, there is very less we can look into. One more thing, kindly try to connect to Outlook or Yahoo! accounts and see if they are working — code looks fine.

Sending emails over .NET framework, and general problems – using C# code[^].