asked on

Help with sending mail Attachment

I am using System.Net.Mail to send e-mail from my program this works fine until i attach a file. The email then gets binned? sent to admin with a message saying that the e-mail account does not exist. This only happens when i add an attachment. Also if i try to send a message outside if the company say to a goggle mail address an error occurs @@@Mailbox unavailable. The server response was: 5.7.1 Unable to relay for @@@@
All address go when sent via outlook.

Any help would be appreciated

ByVal recipient As String, ByVal subject As String, _
        ByVal body As String, Optional ByVal attachmentString As String = "")
        Dim fromAddress As New MailAddress(sender)
        Dim toAddress As New MailAddress(recipient)
        Dim message As New MailMessage(fromAddress, toAddress)
 
        Dim mailSender As SmtpClient
        ' Change the Smtp server name on the next line
        mailSender = New SmtpClient("sprintmail", 25)
 
        message.Bcc.Add(fromAddress)
        message.Subject = subject
        message.IsBodyHtml = False
        message.Body = body
 
 
        If Not attachmentString = "" Then
            Dim msgAttach As New Attachment(attachmentString)
            message.Attachments.Add(msgAttach)
        End If
 
        Try
            mailSender.Send(message)
        Catch ex As Exception
            MsgBox("Error sending mail")
        End Try

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Dirk Haest

' Create the file attachment for this e-mail message.
Dim data As New Attachment(file, MediaTypeNames.Application.Octet)
' Add time stamp information for the file.
Dim disposition As ContentDisposition = data.ContentDisposition
disposition.CreationDate = System.IO.File.GetCreationTime(file)
disposition.ModificationDate = System.IO.File.GetLastWriteTime(file)
disposition.ReadDate = System.IO.File.GetLastAccessTime(file)
' Add the file attachment to this e-mail message.
message.Attachments.Add(data)

g7bmp

ASKER

I have just tried this and get loads of errors Attaching the file is not the problem though. It does attach but does not then send the mail to the recipient. says it is not a valid address. This only happens when there is a file attached.

Dirk Haest

What error do you get ?

g7bmp

ASKER

As below
The account does exist and will go if there is no file attched

The following recipient(s) could not be reached:

The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.

SprintMail.Sprint.local

Control on 28/05/2008 17:00

The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.

SprintMail.Sprint.local

Éric Moreau

your server surely blocks relay. see http://www.systemnetmail.com/

g7bmp

ASKER

Would not this block all mail not just the ones with attchments

Éric Moreau

I was targetting your "Also if i try to send a message outside if the company say to a goggle mail address an error occurs @@@Mailbox unavailable. The server response was: 5.7.1 Unable to relay for @@@@"

g7bmp

ASKER

Oh ok thank for that but still have this attachment issue

g7bmp

ASKER

Still in need of help please

Éric Moreau

is it possible that there are rules on the server that block some attachment? talk to your sysadmin.

g7bmp

ASKER

Hi
There are no rules on the system that block attacments and i have just found out that it will not send to another domain ie google. think it is an exchange problem but do not know what. as i can send from outlook

Éric Moreau

>>it will not send to another domain

Back to sqare one. Relay is blocked. See http://www.systemnetmail.com/faq/1.4.aspx

g7bmp

ASKER

All computers on the domain are allowed to relay mail

ASKER CERTIFIED SOLUTION

Éric Moreau

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g7bmp

ASKER

Used google SMTP works fine thanks