spam-prevention

Spam proof hit counter in Django

I already looked at the most popular Django hit counter solutions and none of them seem to solve the issue of spamming the refresh button. Do I really have to log the IP of every visitor to keep them from artificially boosting page view counts by spamming the refresh button (or writing a quick and dirty script to do it for them)? More ...

Do you hide email addresses to "spam bots" on websites?

Although there are still bots harvesting emails, I'm wondering if you hide email addresses on websites. I know this was common practice a few years back, but it seems that it's starting to fade. Reasons not to: most email servers include quality spam protection, including services such as Gmail and hardly any gets through it's annoyin...

How to Prevent SPAM without CAPTCHAs or a Centrally managed system (e.g. akismet)

Has anyone been able to successfully prevent spam on their site without placing a burden on your visitor (e.g. CAPTCHA) and without using a centralized spam reporting system (e.g. Akismet) I've found this & it looks promising, but doesn't contain detailed deployment instructions. I want to present my web forms without burdening my user...

Good format for spam folder proofing system generated notifaction emails to users?

What is a good email format or phrasing, etc, to use for a system generated notification email such as 'great! your account is read, here is your credentials' and so forth. I want to think of a good one that is rarely likely to go into the Spam folder of customers who could be behind who knows what kind of enterprise network mail filters...

Hiding email from spambots without using javascript

I have a "contact us" form that uses Ajax (i.e. relies on asynchronous requests). In case the user has javascript disabled, I want to display a message, saying something like: You need to enable Javascript to use this contact form. If you can't, or don't know what Javascript is, then use your email and contact us at <the_email_addre...

How can spammers manage to circumvent captcha ?

I have put captcha on my blog, I still get spammers, is there a script somewhere which allows them to do this or do they do this by hand ? ...

How to stop spam in PHPBB3 ?

I'm getting awful lot of spam to my forums where only registered users can post and captcha is in use. What could we best solution to stop spammers registering to my forums? ...

How safe is javascript e-mail obfuscation really?

In order to put e-mail addresses on my sites, I use this Javascript: function showEmailLink(user, domain, linkText) { if (linkText == "") { linkText = user + "@" + domain; } return document.write("<a href=" + "mail" + "to:" + user + "@" + domain + ">" + linkText + "<\/a>"); } so that in my HTML I can write this: please send m...

PHP Detect how many URLS in the string

I'm implementing a contact form for a website, and I'd like to avoid using a captcha because I believe it has a negative effect on user experience. Instead, I've decided to trial detecting the number of URLs that have been submitted with the message. I am retrieving the message as a string from the $_POST submission. I know inbuilt PH...

What's the best way to handle spammers sending unwanted POST data?

My Ruby on Rails blog application is getting a lot of comment spam for a particular blog post even though comments are closed and the comment form is no longer there. The comments are filtered by Akismet so they're not visible, but I'm not sure how my app should best respond to these requests. I thought about simply redirecting to the p...

How does ReCAPTCHA work?

My reading of this article suggests that a benefit of ReCAPTCHA is that it can have humans verify words not recognised in the OCR/digitization of books. It does this by using these words in "Are you human?" tests. So ReCAPTCHA kills two birds with one stone. Great! But I dont get it. If the word can't be recognised by the digitization p...

Will blocking IP-addresses of spammers also block visitors?

My website's comment function is being constantly bombarded with spam posts from these two IP addresses: 94.102.63.11 83.233.30.42 I am currently blocking them at the text level since they all have: weebly.com in them, and I would think that if I block them by IP address then I might also block authentic users. Is it true tha...

What's the best Open Php newsletter manager ?

Hi :) I'm looking for a nice newsletter management solution. I tried CCmail a good script but whaere I can't imort usernames !!! I would like to find a system that is able to import Opt-in lists in the following format : John Smith;[email protected];other paramaeters...;[like] ;Male;Age... I will develop my own module if I could find...

Would this anti-spambot method work?

I am not too familiar with how spambots work. I had a thought on stopping spambots and would like to know if it will work or not. When a user registers, instead of sending a comfirmation email to their email address, user would be shown a link right after the form is completed. User must click on the link to complete registration. Now...

Where can I find good spam and ham corpora?

I'm looking for good spam and ham corpora (this is the plural for corpus). I want those to use them with a bayesian spam filter developed in-house. The only one I found so far is the trec07 corpus but this won't be very useful in my case as I want it for a forum-based website and the trec07 corpus was created from email messages and the...

E-mail in the source : a no-go ?

Hello guys, I have a contact form where the email is actually accessible in the source, because I'm using a cgi file to process it. My concern are the mail crawlers, and I was wondering if this is a no-go and I should switch to another more secure form. Or, if there was some tricks to 'confuse' the crawlers ? Thanks for your ideas. ...

Sending emails to multiple recipients - best practices

My application server needs to notify users about some events via email. Usually there will be between 10-100 users to whom the notifications should be sent, but there may be a few cases where there may be a bit more (I don't think it will ever be more than 1000). What is the best practice in such cases? Should I send a single email per...

Looking for a very simple spam-prevention class/function for ASP Classic

I am looking for a very simple solution to prevent (or reduce) form spamming. I've got quite a few ASP classic applications that contain contact us/miscellaneous forms here and there that generate emails. Few of them have been caught by spam bots and are being abused. I need very simple solution(s) to reduce spam if not eliminate it. Aud...

How to test akismet in a Rails app?

I'm using the rakismet gem to submit user content to Akismet for spam testing. So far every test I have done has classified the content as spam. I'm starting to think I'm doing something wrong. Does anyone know why I might be getting all false positives on my test data? ...

How to prevent spam comments and registrations in Telligent Community Server?

I've added captcha from codebetter site on blog posts and registration form. Number of spam comments was decreased but 1-2 per day is a rule. Do you know how to prevent spam comments and registrations? Thanks. ...