VB.Net SmtpServer.Send(mail) (Winform) not sending email until program closes.

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I have a program I have written that works great. It sends an email when something occurs.

The problem I am running into is the email isn't sent until after I close the program. Not sure how to make the email send immediately.
Any assistance would be greatly appreciated.

Here is the code:

VB

Public Sub File_Deleted(ByVal obj As Object, ByVal e As FileSystemEventArgs)
        Select Case e.ChangeType
            Case WatcherChangeTypes.Deleted
                If InStr(e.Name, ".") < 1 Then
                    'SendEmail(e.FullPath & " - Deleted")
                    Dim SmtpServer As New SmtpClient()
                    Dim mail As New MailMessage()
                    'SmtpServer.Credentials = New  _
                    'Net.NetworkCredential("username@gmail.com", "password")
                    '    SmtpServer.Port = 587
                    'SmtpServer.Host = "smtp.gmail.com"
                    SmtpServer.Host = "smtpserver"
                    mail = New MailMessage()
                    mail.From = New MailAddress("Joe@homesweethome.com")
                    mail.To.Add("Joe@homesweethome.com")
                    mail.Subject = e.FullPath & " - Deleted"
                    mail.Body = "This is for testing SMTP mail"
                    SmtpServer.DeliveryMethod = SmtpDeliveryMethod.Network
                    SmtpServer.Send(mail)
                    'SmtpServer.SendAsync(mail, New Object)
                    'MsgBox("mail send")
                    mail = Nothing
                    SmtpServer = Nothing
                    MsgBox(e.FullPath & " - Deleted")
                End If
        End Select

    End Sub

Posted 9-Jun-11 5:14am

Member 2244190

Updated 9-Jun-11 5:25am

Sandeep Mewara

v2

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Sandeep Mewara 9-Jun-11 11:26am

Elaborate more on The problem I am running into is the email isn't sent until after I close the program. Not sure how to make the email send immediately

Member 2244190 9-Jun-11 14:44pm

Ok.

So the program runs and the code executes to send the email and contiues on.

The emails aren't actually recieved until after the program closes.

I was testing on my development machine, the code executed perfect no errors, but I didn't receive the email in my inbox until after the program closed.

This happened everytime I did run the program no matter how long I waited before closing the program.

Roger

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Ruard · Accepted Answer · 2011-06-09T09:11:00

I think the answer is here:

http://weblogs.asp.net/scottgu/archive/2005/12/10/432854.aspx[^]

Someone named Russ has the same problem and figured it out:

In case anyone is interested, I tracked down the cause of the problem I mentioned above with system.net.mail not sending outgoing messages until the application ends.

It turned out being related to Symantec AntiVirus (Full version 9.0.0.338) that I have running on my machine. I was able to eliminate the problem by turning off the "Internet E-Mail Auto-Protect" feature. Turning it back on resulted in the same send delay. Using the system.web.mail namespace does not exhibit this problem (despite the IDE's warnings about it being obsolete.)