Neither. Past and not present perfect is used to refer to past I am forwarding/ will be forwarding this email to John with whom you spoke last week.
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ScullyI am forwarding
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I will be forwardingBoth are correct. The first gives the impression of immediate action. The second gives the impression of a little more delay before the forwarding takes place.
(Note also vsuresh's corrections.)
CJ
ScullyIf I take out "last week," then is this sentence correct?No, because you can't have with twice like that.
I am forwarding this email to John with whom you spoke with?