Send Email - potatoscript/csharp GitHub Wiki

What is an SMTP port

• SMTP(Simple Mail Transfer Protocol) is the basic standard that mail servers use to send email to one another across the internet.
• SMTP is also used by applications such as Apple Mail or Outlook to upload emails to mail servers that then relay them to other mail servers.

using System.Net.Mail;

MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient("smtp.outlook.com");

mail.From = new MailAddress("[email protected]");
mail.To.Add("[email protected]");
mail.Subject = "Test Mail";
mail.Body = "This is for testing SMTP mail";

SmtpServer.Port = 587;
SmtpServer.EnableSsl = true;
SmtpServer.UseDefaultCredentials = false;
SmtpServer.DeliveryMethod = SmtpDeliveryMethod.Network;
SmtpServer.Credentials = new System.Net.NetworkCredential("[email protected]", "adminPassWord");
SmtpServer.Send(mail);

• An "SMTP" port refers to the specific part of the Internet address that's used to transfer email.
• The web and HTTP use port number 80. For email and SMTP, that port number is depended as below:

Port Number	Description	WHen to Use it
25	Standard SMTP port	Often blocked by ISPs and cloud providers.
465	Out-of-date(deprecated)port for secure SMTP	Do not use unless absolutely necessary
587	Modern port for secure SMTP	The best choice for SparkPost and modern apps
2525	Alternative, non-standard SMTP port	An alternative in case when standard ports are not available

Note

Set SmtpServer.EnableSsl = false; //set to false to prevent the SmtpException: Server does not support secure connections // that mean no need Credentials anymore