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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173
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3answers
13k views

What is the purpose of “gibberish” comments posted to my blog?

Fairly frequently, the contact form on my blog gets comments that look similar to this (each field represents a text box users can enter into the HTML form on the blog): Name: 'ceguvzori' Email: ...
93
votes
10answers
8k 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. ...
72
votes
8answers
8k views

Unsubscribe safely

I have heard that is better to never click to any link in an email. Is it a bad idea to click to a unsubscribe link? What is the best way to unsubscribe to undesired mails?
67
votes
4answers
7k views

Is using 'dot' and 'at' in email addresses in public text still useful?

When entering your email address publicly, a practice is to replace . with text dot and @ with text at. I assume that the reasoning is that this way automatic email-collector robots won't match your ...
64
votes
2answers
10k views

What is the purpose of these weird non-spam emails?

A mail made it through the spam filter and i wonder what the purpose is. It is not spam. Tracking? But how? Who? and why? In the source code there are this weird passages like ... =EA=85=9F =EA=8F=...
55
votes
4answers
3k views

What is the point of gibberish spam

I fairly often happen across forums spammed with messages such as: Arugula (Eruca sativa) is an quarterly green, pretended or roquette. It's been Traditional times, overclever 20 flat has be ...
54
votes
11answers
11k views

Why would a spammer try to get a (normal) image of mine?

Yesterday I found a spam mail in my inbox. I inspected it in order to find out why DSpam and SpamAssasin failed. You can find the raw German mail here, here's a translation: Good Morning. We got ...
37
votes
2answers
16k views

What malicious things can happen when clicking on links in email?

I've received a spam from one of my friends (well I'm sure he didn't send it). so there's this link, and i'd thought what exactly would be the implications of clicking the link (i've not clicked it ...
28
votes
6answers
22k views

Is this “Domain Registration Service” email a scam?

I received an email to the email address listed on our website (it's a generic info@ourcompany.com to help "weed out" spam, whereas each employee has something like andreas@ourcompany.com to which I ...
27
votes
10answers
6k views

How to explain to a customer that spamfilters don't catch everything

I used to work in a small office which provided basic desktop support for users. One day I had to answer a call from a very angry customer and he asked for my boss. He wanted to know how could one ...
26
votes
6answers
16k 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 ...
22
votes
3answers
3k views

How does Bayesian poisoning work?

This answer mentions Bayesian poisoning in passing and I've read the wikipedia page but don't feel I've fully grasped it. The first case, where a spammer sends a spam with a payload (link, malicious ...
21
votes
4answers
2k views

What are spambots doing with unintelligible login attempts?

After constantly being under attack in phpBB, I created a new forum by hand, which successfully prevents spam bots from registering, and I get a report for every failed login attempt, telling me the ...
21
votes
4answers
3k views

Would 'spam' mail really avoid eavesdropping?

spammimic.com offers a service that 'encrypts' your mail as 'spam', the rationale being that all mail services automatically filter out spam, and so if you're wanting to communicate with someone ...
15
votes
4answers
691 views

what to do after suspected intrusion on hobby webserver

I maintain a server to host my files and a number of websites for hobbies and friends. I just noticed that the site summary being returned in google for one of my domains were all porn related (...
13
votes
3answers
2k views

How are spammers using LinkedIn “http://linkedin.com/slink?code=…” URLs?

I was sent this kind of link from presumably compromised Skype account, via a skype message (do not click unless you have a sandbox or something to protect you): https://www.linkedin.com/slink?code=...
12
votes
2answers
2k views

Caller ID Spoof and Text Spams – How do they work?

A lot of people will have at some point received a spam text offering some sort of help via a debt settlement order, or help claiming for an accident that they have never had. I’ve noticed these are ...
11
votes
12answers
7k 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 ...
11
votes
5answers
2k views

Hashcash, is this really used?

I just heard about this term, is it really used? The concept does not seem new, is it used and/or implemented in current technologies?
11
votes
4answers
16k 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).
11
votes
2answers
22k 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 ...
10
votes
5answers
14k views

How and why do people spam my website form?

In have a web form on my website, and someone keeps sending annoying spam through it. I know Captcha can block this, but why do people spam my site - what's their benefit? How do they access my web ...
10
votes
1answer
1k 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. ...
10
votes
3answers
516 views

Email unsubscribe handling security

There is another question with similar title: Unsubscribe safely however my question addresses completely another issue. I am trying to set up a notification system in the website, that will send ...
9
votes
3answers
472 views

What are common/official methods of reporting spam/phishing/nasty-grams to organizations?

A user of mine just received a phishing email claiming to be the IRS. What methods of reporting are available, and what should be included?
9
votes
3answers
897 views

How did the spammers get this address?

A few months ago I configured a test mail server on Amazon AWS, all legit. I used a new address to my catchall-domain (something similar to, but not exactly, test-config-aws-neptune-2014-08@my-domain....
8
votes
4answers
475 views

Next steps after webmail account was compromised

John Doe told me the following story: I got a mail from a good friend. It just contained a single link. That seemed odd but I didn't think a lot about it. After clicking on the link, the web site ...
8
votes
1answer
136 views

Got a spam mail with an htm attachment, is the script harmful?

Today I got an email with an htm attachment, the mth contains the below code: <html> <head> <script> var url = "" window.location.href= url; ...
8
votes
4answers
337 views

Best practice for informing a website they've been compromised?

I've received a spam email that claims to be invoicing me for some service in New Jersey, USA with whom I've not had any dealings. The email includes a link to a zip file that is hosted on a greek ...
8
votes
3answers
697 views

How to protect contact forms against being misused for mass-mailing?

A common function of contact forms is to send the contact message not only to the site owner but also to the person who sent the contact request. What are good measures to protect against the form ...
8
votes
1answer
500 views

Cheap to validate yet expensive to compute hashing algorithm

I am looking for a hashing algorithm somewhat like bcrypt, except that I would like validation to be extremely cheap. As an anti-spam measure I would like to require my clients spend say, half a ...
8
votes
3answers
146 views

How can you prevent email addresses from being harvested from a registration form?

When you go to a website's login form and enter the wrong credentials, the website can give you one of three error messages: Your email is wrong Your password is wrong Your email or password is ...
8
votes
1answer
4k views

How to create your own RBL DNS Blacklist to prevent spam

I am getting sick of reporting the same old chinese emails to Spamcop now and would like to make my own small RBL list that I can easily add blocks of IP's to. I have a spare PC and static IP address ...
7
votes
1answer
2k views

How do I stop attack on my email id from hackers?

We have an email id, info@<ourdomain>.com This email id is being hacked frequently and mails are sent from this email id, Following is the example of one such email. From: info@<ourdomain>...
7
votes
3answers
312 views

SPAM Email Analysis

What are the steps you would follow in order to identify in an email is a SPAM/SCAM/Phishing attempt? The reason I am asking this question is that sometimes very well crafted junk emails manage to ...
7
votes
2answers
4k 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 ...
7
votes
3answers
7k 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 do:...
7
votes
2answers
7k views

Yahoo mail hacked - how to recover, how did it happen and how to prevent?

I was yesterday informed by some friends that they received spam mails with my name as sender. The sender addresses look like firstnamelastname@spacepc.pt and firstnamelastname@revistaplot.com with ...
6
votes
6answers
7k views

How did the spam email sender get my name?

Some time ago I bought something online from a reputable website. I paid through my credit card and everything worked fine. The thing which is important to note is that the name used on the credit ...
6
votes
2answers
2k views

spam with my own domain

At my work we have a very tricky issue with spam. We use postfix, and recently began to receive several spams mail with our own domain. This is obviously very prejudicial for us, because many ...
6
votes
5answers
997 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
votes
1answer
601 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 authorities?...
6
votes
3answers
1k views

Why does a spam sms contain a link to an email address?

A colleague of mine just received a (spam) sms with this message: Congratulations! Your mobile have won $1,000,000,00 Pounds with Draw# 294 64/2013. For more info & claims, contact our ...
6
votes
2answers
58k 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 ...
6
votes
2answers
100 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 ...
6
votes
2answers
861 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 ...
6
votes
2answers
501 views

Statistics on purposes of viruses/malware

Are there any resources that analyze the purpose or goal or the major viruses/malware out in the wild today? For example, what percentage are used to construct botnets (for DDoS or something else)? ...
6
votes
1answer
4k views

Weird visitor from Samara ----forum.topic5982…908.darodar.com? [closed]

I have seen this question asked about a user from Samara,Russia, and when I sifted through all the other occurances,everything everyone else is experiencing matched my experience, except for one thing....
6
votes
1answer
2k views

How to reject e-mails spoofing your own domain targeting your employees at Office365?

One problem Office365 users deal with is that an external SMTP server can spoof the domain of an organization and send e-mails to the domain users; where the e-mails appear to be from employees of the ...
5
votes
6answers
394 views

Spam fighting idea

I have this crazy idea that spam e-mail would not be worth the time of the senders. This is how it's going to work. Someone sets up a reputation-based site, much like stackexchange sites, where ...