Spam is the use of electronic messaging systems (including most broadcast media, digital delivery systems) to send unsolicited bulk messages indiscriminately.

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1answer
214 views

Website Link Spam Hacking Protection [closed]

I've recently been employed as a junior web and software developer for a small company, and noticed that their Home page has had links to completely unrelated sites added like spam to the index.html ...
2
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1answer
185 views

Should admin make SMTP to do sanity checks?

Open SMTP relays are bad. The major email providers such as Gmail and Yahoo do some sanity checks such as the following at the SMTP level to prevent spam to arrive the users' mailboxes: $ telnet ...
2
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4answers
2k views

How to check if range of IP addresses are SPAM blacklisted?

While it's easy to check if a single IP address is blacklisted for SPAM using for example http://www.spamcop.net/bl.shtml, then is there a way to check multiple addresses at once? For example how to ...
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2answers
118 views

My VPS has been shut down now again for the second time for TOS violations, and I really need some help. [closed]

My VPS has been shut down now again for the second time for TOS violations (email spam), and I really need some help. I have been battling with my server being attacked for over a year now. Most of my ...
3
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1answer
3k views

A “new domain registration” spam?

About 6 days ago I purchased a new domain under .org TLD from a local registrar. Few days later, I have received this strange message (which BTW fell to Gmail spam bin), which looks like some kind of ...
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1answer
194 views

Spam mail from my yahoo mail [closed]

Couple of days back spam mail(screenshot link) was sent to all my contacts from my yahoo account, and in my account activity page there is a yahoo partner logged in, from Peru (screenshot link) during ...
88
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10answers
7k views

Why is blog spam always written so badly?

Some spam messages fresh from my Wordpress filter: Asking questions are in fact pleasant thing if you are not understanding something totally, except this article gives good understanding yet. ...
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1answer
147 views

Stopping spam and worms with SPF [closed]

Sender Policy Framework is a system to detect spoofed emails. From http://www.libsrs2.org/overview.html : WHAT EMAIL FORWARDING SERVICES NEED TO KNOW ABOUT SPF To combat spams, worms, and ...
3
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0answers
261 views

What are the statistics on how often client form submissions fail CAPTCHAs? [closed]

We've got plenty of argument that CAPTCHA can easily be beaten, and that they introduce usability problems to users. People say that because they can be broken, they shouldn't be used. So if you've ...
4
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2answers
402 views

Is there a dictionary of visibly similar Unicode characters for Spam processing?

I have spam that looks like this: мy вυddy'ѕ мoм мαĸeѕ $74/нoυr oɴ тнe lαpтop. ѕнe нαѕ вeeɴ lαιd oғғ ғor ѕeveɴ мoɴтнѕ вυт lαѕт мoɴтн нer pαy cнecĸ wαѕ $19420 jυѕт worĸιɴɢ oɴ тнe lαpтop ғor α ...
4
votes
1answer
114 views

Is access to the caller API in mobile phones a real security threat?

From time-to-time I receive "Unknown" caller on my mobile phone. I do not want to answer those calls as I do not trust the identity of a caller. I feel safer if I can see caller name or at least ...
3
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1answer
233 views

Odd user registered and strange behavior. Is it sinister?

I am running a number of web sites. They are all Drupal based, if that is relevant. Recently I have noticed something odd. All my sites have a user registered with the name "zctonglin". I presume ...
2
votes
2answers
271 views

Barracuda antispam access to active directory in dmz : opening port or not?

I have a Barracuda Antispam unit and look to use recipient validation with active directory to stop sending NDRs (non-delivery reports) when we are being spammed. What I see on the web is people ...
2
votes
2answers
17k views

Spam that comes from names in my address book, but not their email addresses

I've recently received two spam messages that show a possibly worrying degree of knowledge about my contacts, and I'm wondering how concerned I should be. Specifically, the names -- but not the email ...
3
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3answers
1k views

Security concerns with malicious NFC tags?

I was reading this article from Life Hacker, How to Automate Your Phone for Every Room in the House with NFC Tags. The idea is to place NFC tags around your house, car, etc. so that you phone will ...
6
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3answers
3k views

Finding spam sending scripts?

What are the tips for finding email spam sending scripts? I ask because usually I hit a wall in shared hosting environments, so I ask this question as a way to get some insight from others. What I ...
10
votes
1answer
843 views

Is there a spam storm? [closed]

I realize this is a bit off-topic, but don't know where else to go to ask... I've gotten an enormous amount of spam in the past 24 hours (hundreds), even after some relatively good spam filters. ...
5
votes
2answers
88 views

What information should I provide to a website or organization when notifying them that their domain may be sending out spam?

Over the past few days, I've received several spam emails coming from the addresses of a school district. I don't know much about email message headers, but since they contain numerous references like ...
11
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6answers
3k views

How do I safely inspect a suspicious email attachment?

I received a pretty blatantly spammy email to my Gmail account. I'm not really sure how it made it through the spam filters, since it has all of the telltale signs. The FROM field is spoofed as ...
1
vote
1answer
326 views

Can a Javascript - WebGL proof of work system prevent website spam?

Is it a good idea to come up with a Javascript-based Proof of Work system to reduce spam on forums, and other websites? This idea would be similar to HashCash, but the computation would be based on ...
1
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1answer
487 views

How do I know if my email account has been hijacked?

A few times now, I've received emails from contacts with subjects along the lines of "hi!" and message bodies of only a link to some website. I've checked the ip of the sender of these emails, and ...
0
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1answer
260 views

What is this spam bot trying to do by filling in my PHP forms randomly? [duplicate]

I have been getting a lot of bot spam lately. The most recent one has this as the body: already to standards Address is is required return ? then with local include accurate Another they in ...
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1answer
251 views

How Do Spammers Exploit Mailto Fields?

I was interested in finding out how spammers can target my Mailto link to send out spams. mailto:foo@domain.com?subject=foo Is it just a case of appending ?from=foo?to=victim1;victim2;victim3 to ...
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1answer
174 views

How much can you trust a (banking) site after it spams you? [closed]

How much can you trust a company that send you spam ? Many people, after registering with Moneybookers(Skrill) started to receive spam that included their real name (as inputted in Moneybookers ...
1
vote
5answers
452 views

Good ways to prevent spammers from registering [duplicate]

Possible Duplicate: Is there a true alternative to using CAPTCHA images? Since everyone hates captchas what are good alternatives? I'm looking to prevent the automated creation of accounts ...
2
votes
2answers
408 views

mod_spamhaus whitelist example to allow a range of ips

How would an example whitelist look like, that would whitelist a range of all IPs from 123.123.0.0 - 123.123.255.255 ? I have the whitelistfile in /etc/spamhaus.wl
3
votes
2answers
894 views

How does the Yahoo webmail exploit work?

I got an email (referring to me by name) from somebody I knew a while ago and the email itself was just two/three lines containing a bit-ly link. Although it seemed like it actually could be ...
1
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1answer
87 views

Is a company responsible for a spam which mentions it?

Let's say I receive a spam which mentions a fictive company printmycatphotos.com. If I follow the link, upload files, and finalize the transaction, clearly printmycatphotos.com has made some profit. ...
9
votes
11answers
5k views

Is there a true alternative to using CAPTCHA images?

Security is about balancing costs and risks, nothing is impossible to beat, specially not typical CAPTCHA implementations, but they do add something no other system seems to offer. I've been reading ...
1
vote
3answers
1k views

Emails wrongly flagged as spam by filter, claiming suspicious URLs

My wife runs a small website (in Japanese) selling vintage products online. She's sending out emails to customers with details about their order, together with images of the products and links to the ...
0
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2answers
172 views

YouTube channel gone crazy!

OK, I use youtube just for listening music and watching videos. I don't upload, and I don't comment. Sometimes I do like some videos/comments. But today I accessed my channel and I saw like 20 ...
6
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5answers
697 views

How do spammers verify the validity of a huge amount of email addresses?

I noticed that there is an email address validation method, that is to telnet to a email MX server and send rcpt command to the server. But for this method, the MX server may abort connection after ...
6
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2answers
2k views

Will reporting phishing emails cause problems for the victim?

On GMail, I've received a phishing email from someone I know, and the email has been sent to other people the victim knows. One of the emails is claiming to be from their GMail address, while the ...
5
votes
4answers
5k views

Spammers bypassing the reCaptcha

I'm using recaptcha on a very simple forum registration page. The script first of all checks if the recaptcha code is valid, then it process. As soon i did put the website live, it got lots of spam ...
2
votes
3answers
251 views

Odd spam in a forum

In the forum http://forums.finehomebuilding.com/breaktime/ (same forum that was one of the subjects of this thread) we're seeing a lot of "spam" of a curious sort. Obvious non-native-English speakers ...
4
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1answer
800 views

Mail server (sendmail) sends spam to innocent people

I asked this same question in serverfault but realized that wasn't the right place, I apologize. Background Server OS: Ubuntu 10.04 Mailing Application: Sendmail Recently I asked about backscatter ...
2
votes
1answer
216 views

Who are these crazy referrers?

In my web pages' IP logs, I have recently begun seeing some very strange referrers, like this: http://haddies.4t.com/tramadol-hcl/tramadol-hcl-200mg.html ...
2
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2answers
151 views

Are these email captchas legitimate?

The last week, I've been getting this kind of emails to addresses that I don't use: Dear Sir, Madam, For security reasons and as part of our ongoing fight against spam, it is our policy not ...
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votes
2answers
236 views

Is it possible to MITM between Google voice SMS/TXT Messaging

I have 2 spammers who won't stop spamming me via SMS once I post stuff online. I would like to determine their location based on language, so if I were to somehow become a man in the middle and have ...
5
votes
1answer
3k views

Facebook page receiving improbable amount of likes from unknown users

A bit of an odd problem, but I'm not totally sure where to post this. I am an administrator for a facebook page that suddenly began receiving hundreds of likes in the past few days. This trend began ...
-1
votes
3answers
250 views

How to find & remove twitter spambot?

Sometimes i can see that i've "retweeted" some tweets , that i actually didn't. And all of them spam to some gaming & pharma websites. I've got windows 7 64bit, norton internet security , using ...
4
votes
1answer
466 views

How to catch a SMS spammer who is using google voice to spam me

How do I catch a SMS spammer who is using google voice to spam me? I have the google voice number and 2 of their burner emails with gmail. How do I gather enough information to inform the ...
1
vote
0answers
225 views

Honeypot for catching a spammer [closed]

I've been receiving more and more emails and now even TXT messages originating from google voice for inquiries of items that I've listed for sale on craigslist. What I would like to accomplish: I ...
6
votes
4answers
6k views

Can most mail from *.ru be considered spam?

Is it safe to assume that most, if not all, emails from a *.ru domain may be considered spam? From a log of 30000 emails from *.ru, its all been spam (over two months).
1
vote
1answer
502 views

What user was this spammer trying to authenticate as?

I have a custom application that monitors and logs a user's SMTP session, and came across this spammer trying to use my MTA as a relay. Is it possible to determine what username they are trying to ...
5
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3answers
2k views

Delivery Failure Notification spam protection?

My domain (example.com) has recently been targeted by spammers who are sending email (somewhere) but forging the sender as random-name@example.com. I have been getting flooded by delivery failure ...
2
votes
1answer
354 views

Is there any reason to not use DKIM, SPF, and SenderID because it affects plausible deniability?

Is there any basis in not deploying anti-spam (or deliverability) technologies like DKIM, SPF, and SenderID because it affects plausible deniability? Some definitions to get everyone on the same ...
9
votes
2answers
18k views

How was my Yahoo email account used to send spams

My yahoo email account was sending spams at about 6:42pm EDT (the spams show 3:42pm PDT) yesterday. I realized it by receiving several "Failure Notice" emails for Yahoo was unable to deliver the spam ...
1
vote
2answers
596 views

Is spam more likely to be sent to info@example.com? Would I be better off using a different address?

I think that when bots gather domain names or process a list of domain names, they create email addresses like info@example.com or support@example.com. Does selecting something different help to ...
1
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1answer
148 views

Reliability of DNSBLs for Stopping Forum Spam

I know that certain DNS blacklists are considered more reliable than others, in that they don't have as many false positives. I run a forum that is known to be spammed, and I've installed a mod to ...