There are lots of non-image-based CAPTCHA ideas floating around. But what about the old-fashioned way? What are the elements of a good image CAPTCHA? What visual elements are hard for computers, but easier for humans? What about mistakes, elements that are easier for computers than they are for humans? What are good techniques for i...
Question is still OPEN... For IT people here it may be not so difficult question. May be not only at first look ;) All ideas are welcome! For startup Antispam project it is needed around 10000 spam mails per day and more. And also (for shingle algorithms) we need six and more modified mails for the same spam letter. Please, if you ha...
Hello, I have setup a Postfix mail server for incoming mails that is required to never reply to external enviornment i.e it will accept all incoming mails and never reply anything that can be used as a trace to locate and verify it's existence. I have implemented the Postfix anti-UCE configuration by using the following settings in po...
Hello, I have setup a receiving Postfix mail server. Here i have custom code written that parses the whole mail received by postfix and use the headers, body and attachments separately for different uses. I have currently added SPF and DKIM checks in postfix that result in appending of their results in the mail header to indicate about...
I am using a simple yet effective anti-spam system at a comments module which seems to be working flawlessly for more than a year now. Since it is capable of recognizing automated comment spam attempts, I am thinking of extending this security module with an ability of adding the offender IPs to a blacklist automatically. Do you think ...
I'm looking for a full list of bank domain names to include in an anti-phish routine I'm planning, does anyone have a list/URL? ...
I have to decide a technique to prevent spam bots from registering my site. In this question I am mainly asking about negative captchas. I came to know about many weaknesses of bots but want to know more. I read somewhere that majority of bots do not render/support javascript. Why is it so? How do I test that the visiting program can'...
I was looking at ClamAV and checked it out. I want to help develop (or learn) on writing Antivirus application. I would like to know if there are more than one (ClamAV) opensource antivirus out there and how would you suggest to fork from an opensource if I wanted to make myself a one. ...
I'm going to be implementing the comments framework and I'm wondering what I should expect to run into. If someone could specifically explain the methods they've tried/tested for anti-spam measures in django and give recommendations I'd greatly appreciate it. And yes, I have read some of the questions here but I haven't run into a detai...