Where should I be looking for the SPF record existence? I have GFI mail essentials on site, and I'm aware they provide a free SPF service with their software, but it's currently shut off.
I'm asking because the spam that is coming from internal sources (spoofing I think this is called?) is increasing for some users. Coming from old email addresses that are rarely used (old contacts that haven't updated their contacts list; people who remember the company as their old name, etc.).