[2008] SMTP MailMessage Freezes My PC

[mujaqo]

Hi,
I'm using the below code to send mail with attachment, its working fine except that my PC freezes for 10 seconds whenever I run this code, is there a way to avoid system lag?,
I tried to lower the process priority by using "Process.GetCurrentProcess.PriorityClass = ProcessPriorityClass.Idle" but it didn't help.

Any suggestions please?

Dim MyMailMessage As New MailMessage

        Try
            MyMailMessage.From = New MailAddress("[email protected]")
            MyMailMessage.To.Add("[email protected]")
            MyMailMessage.Subject = "Mail Subject...."
            Dim attch As New Mail.Attachment("C:\Picture.jpeg")
            MyMailMessage.Attachments.Add(attch)
            MyMailMessage.Body = "Message text...."
            Dim SMTP As New SmtpClient("smtp.gmail.com")
            SMTP.Port = 587
            SMTP.EnableSsl = True
            SMTP.Credentials = New System.Net.NetworkCredential("[email protected]", "myemailpassword")
            SMTP.Send(MyMailMessage)
            
        Catch ex As Exception

        End Try

[dee-u]

Hmmmnnn... Probably using a Backgroundworker to do the sending?

[jmcilhinney]

Are you saying that your whole system becomes unresponsive for 10 seconds or just your application? What happens if you send the same e-mail from your default e-mail client?

[mujaqo]

My whole system freezes when using the above code, I tried sending the same email via outlook and it went through without problems!

[Andy_P]

Is Outlook set up to use port 587 for SMTP as well?

Maybe it is set to use port number 25 which is the default.

Set the port to 25 in your code and see if it works.

[gep13]

Hey,

How big is the attachment that you are trying to add to the email?

You might want to look into the SmtpClients SendAsync method.

http://msdn.microsoft.com/en-us/library/x5x13z6h.aspx

You might have some luck with this.

Hope this helps.

Gary

[icalvo]

Use SMTPClient.SendAsync for a non-blocking operation.