They could have a G-mail or Yahoo account and use an Internet Cafe for all it matters. The question is, do you want employees doing their banking on the clock?
Pro - they can better sell the program when they use it
Con - it is time on the clock. I wouldn't anticipate them doing this "quick check" off the clock.
As ahou said, your policy, your choice.
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AndyZ CRCM
My opinions are not necessarily my employers.
R+R-R=R+R
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell