Option 1
You didn't say much about your environment, but assuming you have it available you could use a PowerShell script; one example is here. The essence of this is:
$smtp = New-Object Net.Mail.SmtpClient("ho-ex2010-caht1.exchangeserverpro.net")
$smtp.Send("[email protected]","[email protected]","Test Email","This is a test")
You could then launch the script from the command line as per this example:
powershell.exe -noexit c:\scripts\test.ps1
Note that PowerShell 2.0, which is installed by default on Windows 7 and Windows Server 2008R2, includes a simpler Send-MailMessage command, making things easier.
Option 2
If you're prepared to use third-party software, an option is something like this SendEmail command-line tool. It depends on your target environment, though; if you're deploying your batch file to multiple machines, that will obviously require inclusion (but not formal installation) each time.
Option 3
You could drive Outlook directly from a VBA script, which in turn you would trigger from a batch file; this would let you send an email using Outlook itself, which looks to be closest to what you're wanting. There are two parts to this; first, figure out the VBA scripting required to send an email. There are lots of examples for this online, including from Microsoft here (old version). Essence of this is:
Sub SendMessage(DisplayMsg As Boolean, Optional AttachmentPath)
Dim objOutlook As Outlook.Application
Dim objOutlookMsg As Outlook.MailItem
Dim objOutlookRecip As Outlook.Recipient
Dim objOutlookAttach As Outlook.Attachment
Set objOutlook = CreateObject("Outlook.Application")
Set objOutlookMsg = objOutlook.CreateItem(olMailItem)
With objOutlookMsg
Set objOutlookRecip = .Recipients.Add("Nancy Davolio")
objOutlookRecip.Type = olTo
' Set the Subject, Body, and Importance of the message.
.Subject = "This is an Automation test with Microsoft Outlook"
.Body = "This is the body of the message." &vbCrLf & vbCrLf
.Importance = olImportanceHigh 'High importance
If Not IsMissing(AttachmentPath) Then
Set objOutlookAttach = .Attachments.Add(AttachmentPath)
End If
For Each ObjOutlookRecip In .Recipients
objOutlookRecip.Resolve
Next
.Save
.Send
End With
Set objOutlook = Nothing
End Sub
Then, launch Outlook from the command line with the /autorun parameter, as per this answer (alter path/macroname as necessary):
C:\Program Files\Microsoft Office\Office11\Outlook.exe" /autorun macroname
Option 4
You could use the same approach as option 3, but move the Outlook VBA into a PowerShell script (which you would run from a command line). Example here. This is probably the tidiest solution, IMO.
