Difference between smtpclient.credentials and mailmessage.from

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Hi All,

I am able to send a test email with following code from a webpage. But I need more clarity while implementing on client side on how to use the credentials property..
Currently I am using same gmail id in smtpclient.credentials and mailmessage.from property

VB

Dim Smtp_Server As New SmtpClient
      Dim e_mail As New MailMessage()
      Smtp_Server.UseDefaultCredentials = False
      Smtp_Server.Credentials = New Net.NetworkCredential("abc@gmail.com", "123")
      Smtp_Server.Port = 587
      Smtp_Server.EnableSsl = True
      Smtp_Server.Host = "smtp.gmail.com"

      e_mail = New MailMessage()
      e_mail.From = New MailAddress(txtFrom.Text)
      e_mail.To.Add(txtTo.Text)
      'e_mail.CC.Add(txtTo.Text)
      e_mail.Subject = "Email Sending"

      link = Server.HtmlEncode("www.google.co.in")
      e_mail.IsBodyHtml = True
      e_mail.Body = txtMessage.Text & " " & "<a href='" & link & "'>Click here</a>"

      Dim attachfile As New Attachment("H:\test.xlsx")
      e_mail.Attachments.Add(attachfile)


      Smtp_Server.Send(e_mail)

Thanks..

Posted 14-Jun-15 5:07am

atul sharma 5126

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Comments

Sergey Alexandrovich Kryukov 14-Jun-15 16:08pm

This is no less of absurd as asking what's the different between paper, letter and postal stamp.
Please 1) try to ask logically sensible questions, 2) read the documentation.
—SA

atul sharma 5126 16-Jun-15 1:16am

Thanks for your suggestion Mr. Sergey!

Please 1) Try to invest you time in helping
2) And not pulling down the less knowledgeable ones.

Sergey Alexandrovich Kryukov 16-Jun-15 6:16am

Aha, it looks like reading the documentation pulls you down? Congratulations!
Thank you for your valuable advice. You really "invest time in helping", not like others.
—SA

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Afzaal Ahmad Zeeshan · Accepted Answer · 2015-06-14T05:17:00

Simple, the Credentials[^] property of the SmtpClient[^] object is used for authentication process on the SMTP server, it is your username/password used by the SMTP client, server or other application using which you can authenticate yourself to use the service.

The From[^] field in the MailMessage[^] object is used in your email message, it is the field that you see in the Email messages' From field. They are (and they can be) different, but sometimes the SMTP server would notify the recipient that the email has not been sent by the From address.

Please read the attached MSDN documentations for the resources, they would clarify the requirement and fields a little bit more.