Cannot get the SMTPClient to work with a Smart Host provided by Cable and
Wireless to the NHS in England using SSL and authentication. It works using
Outlook 2003 client and our code works with a W2K3 Virtual SMTP Server
installed here for testing. Also the same code works with our own ISP but
they do not require SSL or authentication.
All we get is a time out before it downloads the SSL certificate.
We have re-written the code to use CDO and that does work with the Cable and
Wireless smart host.
Are there any known issues that we have not found?
The two sets of code are:
1) System.Net.Mail
Dim oMessage As New System.Net.Mail.MailMessage
With oMessage
.From = m_Sender.Sender
.Sender = m_Sender.Sender
.To.Add(m_Recipient)
.DeliveryNotificationOptions = m_DeliveryNotification
.Priority = m_MailPriority
.Subject = m_Subject
.IsBodyHtml = False
.Body = m_Body
End With
Dim oMail As New System.Net.Mail.SmtpClient(m_Host, m_Port)
With oMail
.DeliveryMethod = SmtpDeliveryMethod.Network
.UseDefaultCredentials = False
.EnableSsl = True
Dim oCredCache As New CredentialCache
Dim oCred As New
System.Net.NetworkCredential(m_Credential1.UserNam e, m_Credential1.Password)
.Credentials = oCred
.Timeout = m_TimeOut
.Send(oMessage)
End With
oMessage.Dispose()
2) Microsoft CDO for Windows 2000
Dim oMessage As New CDO.Message
Dim oConf As New CDO.Configuration
With oConf
.Fields(CDO.CdoConfiguration.cdoSendUsingMethod).V alue =
CDO.CdoSendUsing.cdoSendUsingPort
.Fields(CDO.CdoConfiguration.cdoSMTPServer).Value = m_Host
.Fields(CDO.CdoConfiguration.cdoSMTPServerPort).Va lue = m_Port
.Fields(CDO.CdoConfiguration.cdoSMTPAuthenticate). Value =
CDO.CdoProtocolsAuthentication.cdoBasic
.Fields(CDO.CdoConfiguration.cdoSendUserName).Valu e = m_UserName
.Fields(CDO.CdoConfiguration.cdoSendPassword).Valu e = m_Password
.Fields(CDO.CdoConfiguration.cdoSMTPUseSSL).Value = True
.Fields.Update()
End With
With oMessage
.Configuration = oConf
.From = m_Sender
.To = m_Recipient
.Subject = m_Subject
.TextBody = m_Body
.Send()
End With
