E-mail system - Intermediaries during transfer function

Q.  Which intermediaries are more likely to get involved during the transfer function of an e-mail system?
- Published on 02 Nov 15

a. Storage and forwarding of e-mail for certain addresses
b. Act as gateways to other e-mail or messaging systems
c. Both a & b
d. None of the above

ANSWER: Both a & b

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