Email trouble at one of my websites - HELP

For some reason my website is sending out emails like crazy from the admin email at the website.

It always say:
Username: <br>
Ip Address: 75.125.139.226
Agent: Contextual Ad Bot;http://ads.freekii.com


Anyone know what this can be? I've looked over the admin area, but can't find anything. Can it be something with the cron jobs?

 

do you really think its sufficient info for somebody to post you a solution or guide you?

 

You probably got insecure SMTP server or your script/server was hacked and it's being used to send spam.

 

Are these ads a part of ur site ? i mean did u send that before

 

have you checked latest visitors atleast

 

I haven't had this ad in the system before. I checked the latest visitors yesterday and there was no unusual activities. I've got a complete log system where all the activities is stated.

For someone to send a mail from the system, they have to access the admin area first? Or can they get through some other way?

Regarding an insecure SMTP server - Until now, I've chosen the option "sendmail" in the system instead of SMTP.

 

you need to close open relay for your smtp and enable authentication for everyone want to use your smtp
this will make your smtp more secure from scam and spam using your server

 

Thanks for the tip, nimhost, I'll try that

 

your welcome

 

It seems like a function to detect robots' visit to your site . Is it part of your cms/blog ?

 

No, not as I've installed or noticed before.