You can access CDONTS with Win32::OLE, IIRC. I started to use it for automating emails on Windows, but ended up using Net::SMTP instead. Our requirements are pretty basic so that suffices.

CDONTS can be used with VBScript:

set ar = wscript.Arguments
toaddr = ar.item(0)
subject = ar.item(1)
body = ar.item(2)

Set objCDOMail = CreateObject("CDONTS.NewMail")

objCDOMail.From = "mail@someplace.com"
objCDOMail.to = toaddr
objCDOMail.Subject = subject
objCDOMail.Body = body

objCDOMail.Send
[download]

If you do a SuperSearch on cdonts here, you should be able to locate an example that describes using Win32::OLE.

_{update: Here is the node that I was thinking of when I looked at this question: Mail with CDONTS.}

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"Ex libris un peut de tout"