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Send Emails with Gmail Account with Attachment

Updated: Category: Email
Author: Member Level: GoldPoints: 8

With the code sample below you can send emails via your application using your Gmail account. First you need to change the settings in your Gmail account

step 1: Login to your Gmail Account with from which you will be sending e-mails.

step 2: Go to Gmail settings then click on Forwarding and POP/IMAP

step 3: In IMAP Access Check Enable IMAP

step 4: Then go to your application use below code

The AttachFile() method such be called first, which in turn will call the SendMail() method.

void AttachFile(string attachmentFile)
System.Net.Mail.MailAddress toAddress = new System.Net.Mail.MailAddress("");
System.Net.Mail.MailAddress fromAddress = new System.Net.Mail.MailAddress("");
System.Net.Mail.MailMessage mm = new System.Net.Mail.MailMessage(fromAddress, toAddress);
mm.Subject = "Email Subject";
System.Net.Mail.Attachment mailAttachment = new System.Net.Mail.Attachment(printScreen);
mm.IsBodyHtml = true;
mm.BodyEncoding = System.Text.Encoding.UTF8;

string sendMail(System.Net.Mail.MailMessage mm)
string smtpHost = "";
string userName = "";//sending Id
string password = "your-password";
System.Net.Mail.SmtpClient mClient = new System.Net.Mail.SmtpClient();
mClient.Port = 587;
mClient.EnableSsl = true;
mClient.UseDefaultCredentials = false;
mClient.Credentials = new NetworkCredential(userName, password);
mClient.Host = smtpHost;
mClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
catch (Exception ex)

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Responses to "Send Emails with Gmail Account with Attachment"
Author: Varma Suresh  30 Oct 2009   Member Level: Gold   Points : 0
HI how can I send Mails from Yahoo or Hotmail can u send smtp host name

Author: Gaurav Kumar Arora  30 Oct 2009   Member Level: Gold   Points : 1
A nice representation of code , but there is one more code which is more near to fashion written by Meetu Choudhary.

Suresh - You can check the relevant sites to get their smtp

Author: Varma Suresh  30 Oct 2009   Member Level: Gold   Points : 0
ok thanks for u r repaly...
I got it.

Author: Anand  07 Dec 2010   Member Level: Bronze   Points : 1
please help me i am new to dot net and i unable to send mail with gmail account in windows application

i use the following code.
for attachement

Dim toAddress As New System.Net.Mail.MailAddress("")
Dim fromAddress1 As New System.Net.Mail.MailAddress("")
Dim mm As New System.Net.Mail.MailMessage(fromAddress1, toAddress)
mm.Subject = "SPIN SOFT : Cotton Receipt - MCF Report for the month of " & Format(dtpStartDate, "MMMM, yyyy")
Dim mailAttachment As New System.Net.Mail.Attachment("C:\123.pdf")
mm.IsBodyHtml = True
mm.BodyEncoding = System.Text.Encoding.UTF8
mm.Body = "Please find the attachment for the report in Portable Document Format." & Chr(13) & "Reports generated from Spinsoft. Spinsoft is powered by Vertex Infocomm."

and send mail function is

Sub SendMail(ByVal msg As System.Net.Mail.MailMessage)
Dim smtpHost As String = ""
Dim userName As String = ""
Dim password As String = "mypassowrd"
Dim mClient As New System.Net.Mail.SmtpClient()
mClient.Port = 587
mClient.EnableSsl = True
mClient.UseDefaultCredentials = False
mClient.Credentials = New Net.NetworkCredential(userName, password)
mClient.Host = smtpHost
mClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network

Catch ex As Exception
End Try
End Sub

but i got the following error:

The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication
Required. Learn more at

Thank you


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