Send mail from ASP.NET using your gmail account

 

This article demonstrate that how to send a mail in aspl.net using your gmail account. You can also use other mail account as follow these instructions.

However, one thing the function can’t do is SSL authentication. Lets add that:

public static void SendMail(string sHost, int nPort,
string sUserName, string sPassword, string sFromName,
string sFromEmail, string sToName,
string sToEmail, string sHeader,
string sMessage, bool fSSL)
{
if (sToName.Length == 0)
sToName = sToEmail;
if (sFromName.Length == 0)
sFromName = sFromEmail;

System.Web.Mail.MailMessage Mail = new System.Web.Mail.MailMessage();
Mail.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserver"] = sHost;
Mail.Fields["http://schemas.microsoft.com/cdo/configuration/sendusing"] = 2;

Mail.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserverport"] = nPort.ToString();
if ( fSSL )
Mail.Fields["http://schemas.microsoft.com/cdo/configuration/smtpusessl"] = “true”;

if (sUserName.Length == 0)
{
//Ingen auth
}
else
{
Mail.Fields["http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"] = 1;
Mail.Fields["http://schemas.microsoft.com/cdo/configuration/sendusername"] = sUserName;
Mail.Fields["http://schemas.microsoft.com/cdo/configuration/sendpassword"] = sPassword;
}

Mail.To = sToEmail;
Mail.From = sFromEmail;
Mail.Subject = sHeader;
Mail.Body = sMessage;
Mail.BodyFormat = System.Web.Mail.MailFormat.Html;

System.Web.Mail.SmtpMail.SmtpServer = sHost;
System.Web.Mail.SmtpMail.Send(Mail);
}

Now, the secret is the last parameter, bool fSSL. If true then we set the magic CDO field cdo/configuration/smtpusessl to true:

if ( fSSL )
Mail.Fields["http://schemas.microsoft.com/cdo/configuration/smtpusessl"] = “true”;

If you have SSL authentication pass last parameter true. Which gmail for example uses so look at this example:

SendMail(“smtp.gmail.com”,
465,
“account@gmail.com”,
“”,
“Your name”,
“account@gmail.com”,
“Stefan Receiver”,
“receive@whatever.com”,
“Test”,
“Hello there Steff!”,
true);

So secret to get mail working against gmail is: port 465 – server smtp.gmail.com and ssl = true.

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