I made a PHP form that has been running very smoothly for a few months now. Lately, however, it's been getting a lot of spam. Maybe 100 messages a day. The form is now working sporadically and I have no idea why. None of the code was altered in any way.
My question is: on the server end, could it be possible that the php configuration file was changed or that the server is somehow blocking the mail from going through on a periodic basis?
Basically when a visitor tries to submit the form, they sometimes get a message saying that the mail was not sent on the web page itself. If you don't get the message, it goes through fine.
I realize there isn't much to go with, but I'm simply looking for possibilities. We had a working form that passed 300+ tests without a hiccup, and now for some reason it only works some of the time.