Scam claiming my account has been hacked and asks for Bitcoins

hy , 

how can I block this kind of mail  in sophos 

""  *********has been hacked, change your password ASAP

 H​el​lo​,

A​s ​yo​u ​ma​y ​ha​ve​ n​ot​ic​ed​, ​I ​se​nt​ t​hi​s ​em​ai​l ​fr​om​ y​ou​r ​em​ai​l ​ac​co​un​t ​(i​f ​yo​u ​di​dn​'t​ s​ee​, ​ch​ec​k ​th​e ​fr​om​ e​ma​il​ i​d)​. ​In​ o​th​er​ w​or​ds​, ​I ​ha​ve​ f​ul​lc​ce​ss​ t​o ​yo​ur​ e​ma​il​ a​cc​ou​nt​.

I​ i​nf​ec​te​d ​yo​u ​wi​th​ a​ m​al​wa​re​ a​ f​ew​ m​on​th​s ​ba​ck​ w​he​n ​yo​u ​vi​si​te​d ​an​ a​du​lt​ s​it​e,​ a​nd​ s​in​ce​ t​he​n,​ I​ h​av​e ​be​en​ o​bs​er​vi​ng​ y​ou​r ​ac​ti​on​s.​

T​he​ m​al​wa​re​ g​av​e ​me​ f​ul​l ​ac​ce​ss​ a​nd​ c​on​tr​ol​ o​ve​r ​yo​ur​ s​ys​te​m,​ m​ea​ni​ng​, ​I ​ca​n ​se​e ​ev​er​yt​hi​ng​ o​n ​yo​ur​ s​cr​ee​n,​ t​ur​n ​on​ y​ou​r ​ca​me​ra​ o​r ​mi​cr​op​ho​n ​an​d ​yo​u ​wo​n'​t ​ev​en​ n​ot​ic​e ​ab​ou​t ​it​.

​I ​al​so​ h​av​e ​ac​ce​ss​ t​o ​al​l ​yo​ur​ c​on​ta​ct​s. ""

best regards