service status?

Iwas just playing around with my bold when I clicked on service status it said the bis was conected
To wifi and bes was not conected? I could send and receive email. What does bes acually do.
On my torch both bis and bes were allways conected to my home wifi
Thanks

Apdate...actually I just tried to send a email and it aint working. It was fine yesterday
And come to think of it I haven't gotten an email allday.

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