Send email using System.Net.Mail through gmail

Question

I want to send a email through gmail server. I have put the following code but it is getting stuck while sending. Any idea please....

MailMessage mail = new MailMessage();

mail.From = new System.Net.Mail.MailAddress("[email protected]");

//create instance of smtpclient
SmtpClient smtp = new SmtpClient();
smtp.Port = 465;
smtp.UseDefaultCredentials = true;

smtp.Host = "smtp.gmail.com";            

smtp.EnableSsl = true;

//recipient address
mail.To.Add(new MailAddress("[email protected]"));

//Formatted mail body
mail.IsBodyHtml = true;
string st = "Test";

mail.Body = st;
smtp.Send(mail);

The xxxx.com is a mail domain in Google apps. Thanks...

Don't you need to enter your password somewhere for the SMTP server? — user541686
– user541686, Commented Jan 13, 2011 at 6:14
What Lambert said. Default credentials is Windows related. You would need to specify them for GMail. — leppie
– leppie, Commented Jan 13, 2011 at 6:15

Jon · Accepted Answer · 2011-08-31 12:10:59Z

82

+50

MailMessage mail = new MailMessage();
mail.From = new System.Net.Mail.MailAddress("[email protected]");

// The important part -- configuring the SMTP client
SmtpClient smtp = new SmtpClient();
smtp.Port = 587;   // [1] You can try with 465 also, I always used 587 and got success
smtp.EnableSsl = true;
smtp.DeliveryMethod = SmtpDeliveryMethod.Network; // [2] Added this
smtp.UseDefaultCredentials = false; // [3] Changed this
smtp.Credentials = new NetworkCredential(mail.From,  "password_here");  // [4] Added this. Note, first parameter is NOT string.
smtp.Host = "smtp.gmail.com";            

//recipient address
mail.To.Add(new MailAddress("[email protected]"));

//Formatted mail body
mail.IsBodyHtml = true;
string st = "Test";

mail.Body = st;
smtp.Send(mail);

edited Aug 31, 2011 at 12:10

Jon

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answered Jan 13, 2011 at 6:20

Sarwar Erfan

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7 Comments

JCTLK Over a year ago

Thanks Sarwar... Your guess with the port is correct. I will upvote this tomorrow.

Bob Kaufman Over a year ago

A few observations: 1. It's "smtp.gmail.com", not "smtp.google.com". I was staring at my code for half an hour until I realized I was using the latter. 2. Port 587 seems to work a lot better than 465 even though everything else I've read on the subject says to use port 465. 3. If you're using two-step verification, and you'd better be (see codinghorror.com/blog/2012/04/make-your-email-hacker-proof.html) you must generate a new password for your application.

Kyle Over a year ago

FYI, as I ran into this: Enclose your SmtpClient object in a using clause. You must do this especially if you're going to be using the client in a loop.

avgbody Over a year ago

Using a using clause would be wise so that the smtpclient " sends a QUIT message followed by gracefully ending the TCP connection".

mdiehl13 Over a year ago

This solution (using System.Net.Mail) doesn't work for implicit SSL (using port 465). You must use something else like AbrahamJP's solution. (blogs.msdn.com/b/webdav_101/archive/2008/06/02/…)

|

AbrahamJP · Accepted Answer · 2011-01-25 14:50:54Z

I tried the above C# code to send mail from Gmail to my Corporate ID. While executing the application the control stopped indefinitely at the statement smtp.Send(mail);

While Googling, I came across a similar code, that worked for me. I am posting that code here.

class GMail
{
    public void SendMail()
    {  
        string pGmailEmail = "[email protected]";
        string pGmailPassword = "GmailPassword";
        string pTo = "ToAddress"; //[email protected]
        string pSubject = "Test From Gmail";
        string pBody = "Body"; //Body
        MailFormat pFormat = MailFormat.Text; //Text Message
        string pAttachmentPath = string.Empty; //No Attachments

        System.Web.Mail.MailMessage myMail = new System.Web.Mail.MailMessage();
        myMail.Fields.Add
            ("http://schemas.microsoft.com/cdo/configuration/smtpserver",
                          "smtp.gmail.com");
        myMail.Fields.Add
            ("http://schemas.microsoft.com/cdo/configuration/smtpserverport",
                          "465");
        myMail.Fields.Add
            ("http://schemas.microsoft.com/cdo/configuration/sendusing",
                          "2");
        //sendusing: cdoSendUsingPort, value 2, for sending the message using 
        //the network.

        //smtpauthenticate: Specifies the mechanism used when authenticating 
        //to an SMTP 
        //service over the network. Possible values are:
        //- cdoAnonymous, value 0. Do not authenticate.
        //- cdoBasic, value 1. Use basic clear-text authentication. 
        //When using this option you have to provide the user name and password 
        //through the sendusername and sendpassword fields.
        //- cdoNTLM, value 2. The current process security context is used to 
        // authenticate with the service.
        myMail.Fields.Add
        ("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
        //Use 0 for anonymous
        myMail.Fields.Add
        ("http://schemas.microsoft.com/cdo/configuration/sendusername",
            pGmailEmail);
        myMail.Fields.Add
        ("http://schemas.microsoft.com/cdo/configuration/sendpassword",
             pGmailPassword);
        myMail.Fields.Add
        ("http://schemas.microsoft.com/cdo/configuration/smtpusessl",
             "true");
        myMail.From = pGmailEmail;
        myMail.To = pTo;
        myMail.Subject = pSubject;
        myMail.BodyFormat = pFormat;
        myMail.Body = pBody;
        if (pAttachmentPath.Trim() != "")
        {
            MailAttachment MyAttachment =
                    new MailAttachment(pAttachmentPath);
            myMail.Attachments.Add(MyAttachment);
            myMail.Priority = System.Web.Mail.MailPriority.High;
        }

        SmtpMail.SmtpServer = "smtp.gmail.com:465";
        SmtpMail.Send(myMail);
    }
}

I am getting the message from the compiler that the System.Web.Mail methods are deprecated.

OneCricketeer · Accepted Answer · 2021-12-21 18:17:03Z

7

Set

smtp.UseDefaultCredentials = false

and use

smtp.Credentials = new NetworkCredential(gMailAccount, password);

edited Dec 21, 2021 at 18:17

OneCricketeer

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answered Jan 13, 2011 at 6:16

Saokat Ali

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1 Comment

JCTLK Over a year ago

I used this answer also. But Sarwar's answer completely solved my problem. Thanks alot and I will upvote this tomorrow. Cheers.

BernieSF · Accepted Answer · 2017-10-24 20:37:06Z

This have worked for me:

        MailMessage message = new MailMessage("[email protected]", toemail, subjectEmail, comments);
        message.IsBodyHtml = true;

        try {
            SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
            client.Timeout = 2000;
            client.EnableSsl = true;
            client.DeliveryMethod = SmtpDeliveryMethod.Network;
            //client.Credentials = CredentialCache.DefaultNetworkCredentials;
            client.UseDefaultCredentials = false;
            client.Credentials = new System.Net.NetworkCredential("[email protected]", "mypassord");
            client.Send(message);

            message.Dispose();
            client.Dispose();
        }
        catch (Exception ex) {
            Debug.WriteLine(ex.Message);
        }

BUT (as of the time of this writing - Oct 2017)

You need to ENABLE "Allow less secure apps" inside the option "apps with account access" at the "My account" google security/privacy settings (https://myaccount.google.com)

Dave B · Accepted Answer · 2018-07-11 17:23:44Z

I realise this is an answer to a very old question, with lots of other good answers. I am posting this code to include some of the useful comments posted by other users such as Using Statements and newer methods where some answers have obsolete methods. This code was tested and working as of 11 July 2018.

If sending via your GMail Account ensure that Allow less secure apps is enabled from your control panel

Class Code C#:

public class Email
{
public void NewHeadlessEmail(string fromEmail, string password, string toAddress, string subject, string body)
{
    using (System.Net.Mail.MailMessage myMail = new System.Net.Mail.MailMessage())
    {
        myMail.From = new MailAddress(fromEmail);
        myMail.To.Add(toAddress);
        myMail.Subject = subject;
        myMail.IsBodyHtml = true;
        myMail.Body = body;

        using (System.Net.Mail.SmtpClient s = new System.Net.Mail.SmtpClient("smtp.gmail.com", 587))
        {
            s.DeliveryMethod = SmtpDeliveryMethod.Network;
            s.UseDefaultCredentials = false;
            s.Credentials = new System.Net.NetworkCredential(myMail.From.ToString(), password);
            s.EnableSsl = true;
            s.Send(myMail);
        }
    }
}
}

Class Code VB:

Public Class Email    
Sub NewHeadlessEmail(fromEmail As String, password As String, toAddress As String, subject As String, body As String)
        Using myMail As System.Net.Mail.MailMessage = New System.Net.Mail.MailMessage()
            myMail.From = New MailAddress(fromEmail)
            myMail.To.Add(toAddress)
            myMail.Subject = subject
            myMail.IsBodyHtml = True
            myMail.Body = body

            Using s As New Net.Mail.SmtpClient("smtp.gmail.com", 587)
                s.DeliveryMethod = SmtpDeliveryMethod.Network
                s.UseDefaultCredentials = False
                s.Credentials = New Net.NetworkCredential(myMail.From.ToString(), password)
                s.EnableSsl = True
                s.Send(myMail)
            End Using

        End Using
    End Sub
End Class

Usage C#:

{
Email em = new Email();
em.NewHeadlessEmail("[email protected]", "password", "[email protected]", "Subject Text", "Body Text");
}

Usage VB:

Dim em As New Email
em.NewHeadlessEmail("[email protected]", "password", "[email protected]", "Subject Text", "Body Text")

Munjal Pandya · Accepted Answer · 2013-11-13 06:34:28Z

Use Port number 587

With the following code, it will work successfully.

MailMessage mail = new MailMessage();
mail.From = new MailAddress("[email protected]", "Enquiry");
mail.To.Add("[email protected]");
mail.IsBodyHtml = true;
mail.Subject = "Registration";
mail.Body = "Some Text";
mail.Priority = MailPriority.High;

SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
//smtp.UseDefaultCredentials = true;
smtp.Credentials = new System.Net.NetworkCredential("[email protected]", "<my gmail pwd>");
smtp.EnableSsl = true;
//smtp.DeliveryMethod = SmtpDeliveryMethod.Network;

smtp.Send(mail);

But, there is a problem with using gmail. The email will be sent successfully, but the recipient inbox will have the gmail address in the 'from address' instead of the 'from address' mentioned in the code.

To solve this, please follow the steps mentioned at the following link.

http://karmic-development.blogspot.in/2013/10/send-email-from-aspnet-using-gmail-as.html

before following all the above steps, you need to authenticate your gmail account to allow access to your application and also the devices. Please check all the steps for account authentication at the following link:

http://karmic-development.blogspot.in/2013/11/allow-account-access-while-sending.html

vijay · Accepted Answer · 2015-06-12 15:29:51Z

0

    ActiveUp.Net.Mail.SmtpMessage smtpmsg = new ActiveUp.Net.Mail.SmtpMessage();
    smtpmsg.From.Email = "[email protected]";
    smtpmsg.To.Add(To);
    smtpmsg.Bcc.Add("[email protected]");
    smtpmsg.Subject = Subject;
    smtpmsg.BodyText.Text = Body;

    smtpmsg.Send("mail.test.com", "[email protected]", "user@1234", ActiveUp.Net.Mail.SaslMechanism.Login);

answered Jun 12, 2015 at 15:29

vijay

1

1 Comment

Werner Henze Over a year ago

Some words about what your solution would be nice.

Pokemon · Accepted Answer · 2020-12-17 09:40:24Z

0

simple code works

MailMessage mail = new MailMessage();
mail.To.Add(to);
mail.From = new MailAddress(from);
mail.Subject = subject;
mail.Body = body;
mail.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient("smtp.gmail.com",587);
smtp.EnableSsl = true;
smtp.UseDefaultCredentials = false;
smtp.Credentials = new System.Net.NetworkCredential(address, password);
smtp.Send(mail);

answered Dec 17, 2020 at 9:40

Pokemon

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