Hi, I have recently created a new website http://myurl.us. I have tried doing a similar project earlier, but my hosting banned me. They say I was sending too many emails through the website. I am unaware how it was done. Can you please tell me how a site like this can have problems in terms of security. Hope to get some expert advise . Thanks imphpguru.
Any scripts that send mail out etc? Your old host provider most likely had insecure sendmail/exim or you have insecure mailing scripts that people have taken advantage of.
I think someone might have exploited a secuirty hole in your site and they might be sending a mails via it..
It doesn't look like your service requires sending out any mails so you can stop any mail service that might already be running on the server. Try telnet to your server's port 25 and see if it responds. If it does, check if any MTAs are turned on (Exim, Sendmail, Postfix etc.). You should be able to turn these off with "service stop <service name>" and "chkconfig --level 3 <service name> off".
I believe he is on the shared server so he has to contact his host to start/stop/restart any service. Also, there are many reasons for this issue. [1] If you have any insecure contact form. [2] Insecure or exploited PHP or ASP script in your domain. [3] Check the contents of your site and remove any suspicious contents. Generally spammers upload their mail script using any exploited script in the web site. Kailash