I've Googled everywhere for a solution for this, but though the same issue appears to be happening to a lot of people, I havent found anything that helped.
Several of my clients are receiving loads of spam emails with the senders email being their own.
The emails subject line is:
Environmental corporation searching for representatives worldwide.
The emails are not being sent from any scripts in the sites and all the code appears clean.
I have also updated the sites CMS.
Would anyone know how to get round this issue? Any help is appreciated!