unwanted 'sent' emails

unwanted 'sent' emails

Dear Sirs,

 

Please check in my account and look in my ‘sent’ box!

My email address is being used as a reply/return service, where people use my email as a reply/return address.

I’ve never written these messages and they being sent by somekind of automated reply service. I also see in my spam folder emails which are returned which I never have sent ? Now I am blocked for outgoing mail?

Thank you!

Nicolass Ariens