Send email using smtp.att.yahoo.com with SSL (port 465).

Download Chilkat Email ActiveX

Download 32-bit Chilkat IMAP ActiveX (.msi)

Download All 32-bit Chilkat ActiveX Components (.zip)

Download All 64-bit Chilkat ActiveX Components (.zip)

'  The mailman object is used for sending and receiving email.
Dim mailman As New ChilkatMailMan2

'  Any string argument automatically begins the 30-day trial.
Dim success As Long
success = mailman.UnlockComponent("30-day trial")
If (success <> 1) Then
    MsgBox "Component unlock failed"
    Exit Sub
End If

'  Set the SMTP server.
mailman.SmtpHost = "smtp.att.yahoo.com"

mailman.SmtpUsername = "myUsername@sbcglobal.net"
mailman.SmtpPassword = "myPassword"

mailman.SmtpSsl = 1
mailman.SmtpPort = 465

'  Create a new email object
Dim email As New ChilkatEmail2

email.Subject = "This is a test"
email.Body = "This is a test"
email.From = "Chilkat Support <support@chilkatsoft.com>"
email.AddTo "Chilkat Admin","admin@chilkatsoft.com"

success = mailman.SendEmail(email)
If (success <> 1) Then
    MsgBox mailman.LastErrorText
    Exit Sub
End If

success = mailman.CloseSmtpConnection()
If (success <> 1) Then
    MsgBox "Connection to SMTP server not closed cleanly."
End If

MsgBox "Mail Sent!"