When the sender is connected to the mail server via a LAN or a WAN, we

1.	When the sender is connected to the mail server via a LAN or a WAN, we need ______________.
A.	two MTA
B.	two UAs and two pairs of MTAs
C.	two UAs and a pair of MTAs
D.	none of the above
Answer» C. two UAs and a pair of MTAs

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When the sender is connected to the mail server via a LAN or a WAN, we need ______________.

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