I have two forms on my website: contact us and suggest a category. These both email me when they are submitted. On a couple of occasions I get a surge of emails from the form that look something like this: And they put in the contact emai something like this: At one point I was getting dozens of them but it stopped once I switched servers. Now I'm just curious as to WHAT exactly is happening? I'm going to look into coding an image verification field to make it stop but I want to know what they are trying to achieve... Thanks in advance!
--Note-- It looks like they are trying to change the email headers to send out spam but I'm curious as to if its actually working?
somebody is misusing your mail program for promoting spam. They auto insert into database or email spam. The ONLY way to stop them is by using turing image validation.
I would suggest you to modify your contact form to make it more secure to prevent spammers from using it. There are ways to prevent contact form from being modified and email addresses inserted.
try reparsing the entry on your mail form to make all the entry as not recognizable by you postfix as parameters..
Check your logs to find the agent who are submiting the data. Then modify the form, to display a fake form to the spammer agent that don't send any email but look legit. I avoided some spam with this method.