Trying to send e-mail from VB .NET program

[Sielah]

I'm trying to add an e-mail send utility to my VB program, but not having much luck.

I'm using Visual Studio 2005, and I have added Imports System.Net.Mail to the module.

Here's my code :

Dim objSmtpClient As SmtpClient
Dim objMailMessage As MailMessage
Dim objMailAddress As MailAddress

objSmtpClient = New SmtpClient
objMailAddress = New MailAddress("myname@mycompany.com")
objMailMessage = New MailMessage(objMailAddress, objMailAddress)

objMailMessage.Subject = "test"
objMailMessage.Body = "test"

objSmtpClient.Host = "<smtp host name>"
objSmtpClient.Port = 25

Call objSmtpClient.Send(objMailMessage)

The Send method fails with the following error :

{"Unable to connect to the remote server"}
{"No connection could be made because the target machine actively refused it"}

I verified the SMTP host settings with our mail server specialist. He told me that it should not be necessary to use credentials when sending e-mails internally, as our servers allow anonymous requests.

Anybody have any advice on why the send method is failing?

 

[jebenson]

Make sure your email server doesn't require some form of authentication, such as SSL or TLS. This has burned me in the past, even with anonymous connections.


I used to rock and roll every night and party every day. Then it was every other day. Now I'm lucky if I can find 30 minutes a week in which to get funky. - Homer Simpson

Arrrr, mateys! Ye needs ta be preparin' yerselves fer Talk Like a Pirate Day!

 

[Sielah]

I followed up with our e-mail server expert, and he advised that the problem was probably being caused by our AV software.

I asked our AV admin team to add my computer to the policy exclusion list, and was then able to generate e-mail requests.

Thanks!