This is a trivial question but I want to understand how spam works. On my site I get a contact us form submitted every night between 2:30am to 3:00am. There is not message in the form and I know it is a spam. But my question is what type of spam it is? Why not post something when you submit, whey not post it multiple times, why just one time, why only at this time of the day? What type of spam it is? Are there different of of it?
What type of spam is this?
spam