Hi there and welcome
Yes, someone has accessed your account, they got hold of your address book then emails all your contacts with a scam email. Usually these is something like you are stranded in a foreign country and need money and send it to this account ect.
The first thing you should do is inform your contacts about the possibility of these fake emails and to ignore any suspicious emails that they may receive.
Then change your password, which you can do via my link
Make is complex and hard to guess, eg: if you use ilovepizza make id 1l0v3pizz@
which keeps it easy to remember but near impossible to guess.
This would then stop any further access
If you would like any additional information or assistance, please do not hesitate to let me know.
Else if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.