I have a domain and I have set up personalized email adresses via Google apps. From time to time i get out of office replies to addresses like this: BuyViagra.Here, where the @domain.com is my domain.
I am pretty sure no-one has hacked the actual domain. Also, I have added some SPF entry in the DNS file, something like: “v=spf1 include:”
Should I do anything more? I know that you can easily fake any email adress, but I am concerned that the domain may become blacklisted.