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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8
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74 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 ...
1
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2answers
52 views

Getting spam calls from numbers similar to my own

My phone number is 456-123-XXXX (American phone number + area code). Over the past few months I get fairly regular spam calls from other numbers also beginning with 456-123-XXXX, where the last four ...
54
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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 ...
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1answer
40 views

How does SMTP facilitate sending spam? [on hold]

My friend tells me that there are exist weakness of the Simple Mail Transfer Protocol (SMTP) that make make it easy to send spam. Is this true?
9
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4answers
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?
0
votes
1answer
128 views

Correct way of dealing with spam via impersonation

I've been having a recurring problem at work: My boss's contacts keep receiving emails with links sent by a fake adress. The adress always has my boss's name + a different domain name every time. ...
1
vote
3answers
112 views

Is it possible to gain control of a Windows computer with no browser notifications when a user clicks a URL?

If so, how? Currently working on a spam filter for a large company and trying to determine the level of risk involved with this. We run many different Windows versions. This CNN video seems to imply ...
1
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0answers
84 views

How Skype Click to Call plugin is used to send spam?

My friend had Skype Click to Call plugin installed within browser on Mac OSX. And his Skype account started to send some automatic spam messages linking to lose weight websites (via goo.gl) without ...
0
votes
1answer
32 views

Unique human view count system without captcha on Pay Per click system, using cryptographic proof of work

I have a system that will be paying users per unique view on a page. I need to prevent 80% of fraudulent automated traffic from being counted. I need to avoid captcha.I would like to implement a ...
2
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3answers
39 views

Is there any benefit to spammers oversaturating a service?

If I understand correctly, spam is most effective when it looks like real content and entices a user to do whatever the spam is asking it to (for example, clicking on a link.) Naturally, keeping a low ...
3
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3answers
275 views

I'm getting spam e-mail…from myself?

I noticed yesterday that I had received spam e-mail, but my own e-mail address was listed as the sender. Naturally, I changed my password. This is probably a spoof, but I don't know enough about ...
7
votes
3answers
577 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 measurements to protect against the form ...
0
votes
3answers
112 views

Where can I get a list of “bad” IP addresses that are likely to be used by attackers or spammers?

Is there an open source project or a list of "bad" IP addresses or ranges that are likely to be used by attackers or spammers? UPDATE: ideally I want it to be a service call so I can call it using ...
8
votes
1answer
106 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; ...
0
votes
1answer
44 views

“Secure” emails from unfamiliar source(s)

The context is long, so I'll ask my question first. If an encrypted message is received from an unfamiliar sender and it's spam, how can I avoid receiving further messages of the same sort? If it's ...
4
votes
1answer
141 views

What are the point of these gibberish comments?

On this site there are comments such as: ÃÊÁ ¹67 Èìåíè Âîðîõîáîâà â Ìîñêâå (Ãîðîäñêîé äåïàðòàìåíò çäðàâîîõðàíåíèÿ) ïî ïðàâó íà -ñåãîäíÿøíèé äåíü ñ÷èòàåòñÿ êðóïíåéøèì âðà÷åáíûì çàâåäåíèåì ãîðîäà ...
3
votes
2answers
503 views

Suspecious js file sent as email attachment

I received a js file with following code in my spam folder but I decided to take a look into the file. Do anybody of you know what does this code might do? var evl='';function nr() { evl = '}; ' + ...
1
vote
2answers
83 views

Is this spam SMS containing an audio file dangerous?

Yesterday I received a group text message from a number I don't know and opened it by mistake. I was in a group chat with two other people, one in Pennsylvania one in Massachusetts. The message body ...
26
votes
6answers
18k 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 ...
2
votes
2answers
41 views

Does ISO 27001 allow cloud based Spam/Malware filter solutions

We are currently switching over to Exchange 2013 and we are thinking about outsourcing the spam and malware filtering to Microsofts Exchange Online Protection. Its implemented by changing the MX ...
6
votes
2answers
5k 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 ...
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 ...
65
votes
4answers
6k 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 ...
2
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1answer
46 views

Can spambots access pages available to only registered, authenticated users?

I have a web application where users register and are activated via an email sent to the email address they supplied. Then there are pages that are only visible to registered users (non-user access ...
3
votes
1answer
41 views

A single site for reporting unknown virii

I have just received an email with an unknown virus. I happily passed through my scanners. I have checked it's still unknown to all of 4 anti-viruses I have an access to. I have already reported it ...
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1answer
61 views

Server is Sending Spam

I have determined that my server is compromised because it is sending spam (from one of my legitimate addresses). How can I determine what's compromised? Does the attacker know my SSH password? ...
170
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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: ...
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votes
1answer
121 views

What is the purpose of viagra spam? [closed]

We all have gotten them: The reflection of your size will stay forever in her eyes. Bigger pen!s gives you a bunch of benefits! I have girls that ring me for sex now, its amazing! Judging by ...
0
votes
1answer
34 views

Changing senders, same spam messages

We have a situation at work regarding to our mail filtering appliance and I was hoping that you could give us some insight on how to approach this issue. We've been receiving spam emails with the ...
4
votes
2answers
237 views

Reaction to spam from acquaintance

It often happens that I receive an email like this: From: acquaintance@herbal-viagra.com To: me@domain.com Hi, me@domain.com -- Check this out: http://herbal-viagra.com -- ...
0
votes
1answer
56 views

Does a 'mailto:' hyperlink spoil any preceding email obfuscation efforts in PDF?

Assume there is a PDF file which contains the example@example.com email address as an image (the classic obfuscation method). However, what if this image is made clickable with a hyperlink which ...
23
votes
6answers
11k 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 ...
6
votes
1answer
619 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 ...
1
vote
2answers
99 views

How to prevent phishing mails from being successful? [duplicate]

I'd like to know what the best methods are to prevent success of phising mails. This question contains the following subquestions: What are the best ways to determine incoming phising mails (on a ...
1
vote
0answers
111 views

How to know which extension or software is causing ads in Chrome? [closed]

Starting yesterday, I noticed that something weird is going on with my laptop. After unlocking my laptop I found that the empty Chrome pages that I opened are getting redirected to ads. I am running ...
2
votes
1answer
81 views

Why are packets constantly being sent to international ISPs?

When using a packet sniffer, I notice a lot of packets being sent to a bunch of ISPs (such as axion.ca, wanadoo.fr/orange?, bresnan.net, zebra.lt) usually all at the same time. Here's a screenshot of ...
3
votes
2answers
131 views

Is it appropriate to block a sender's email address

This morning I received a mail from Apple suspension UK <do_not_reply@apple.co.uk> with the subject Apple "Unauthorised transaction alert". The mail was sent to one of my company's distribution ...
62
votes
2answers
9k 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 ...
70
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?
2
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0answers
36 views

How should end users respond to Earthlink's “Allowed Sender” feature when blocked by policy?

Some of our users are requested to click on an Earthlink antispam URL below https://webmail.pas.earthlink.net/wam/addme?a=USERNAME@earthlink.net&id=<SOME GUID> However our firewall ...
4
votes
3answers
540 views

Using + for email addresses to find out who is selling your data: is it naive or is it effective?

It's pretty common among security-minded folks to fill in addresses using e.g. foo+company@gmail.com when disclosing their email address to company so that they can tell if company has sold their ...
4
votes
1answer
144 views

Is this some kind of Bayesian poisoning?

So I've been reading my spam lately, and today I received this: To: my actual email, but with a name found here: tel2name.com (only hit on Google) Subject: one seemingly random excerpt of a web ...
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votes
2answers
110 views

How to deal with SMS spam? [closed]

Every few weeks, I get an annoying SMS trying to sell me something, or trying to get me to click something, or otherwise spamming me. I don't think it's a targeted thing- I think my phone number is ...
3
votes
3answers
129 views

Email injection in simple terms?

Can someone explain why spammers use email injection? I am a victim and was wondering if there was any other malicious point besides annoying me and filling up my e-mail?
2
votes
1answer
50 views

Website Spam Bots In Google Analytics

I had a website URL which was getting around 60 hits a day from typical spam suspects like buttons-for-websites & ***.semalt, etc, etc. So I decided that when I changed my hosting account I would ...
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0answers
149 views

Why is my website getting spammed?

Does anyone recognize this type of spam? NAME: Bagas EMAIL: dq95zxm7l@gmail.com PHONE: JCBUIR6ulwtO COMMENTS: I must express apaotcipeirn to the writer for bailing me out of this particular ...
4
votes
2answers
363 views

Pawn in a nefarious porn marketing campaign?

About a month ago we upgraded (maybe not the right term) our site to WordPress. In that time we went from about 3800 inbound links (according to Google WebMaster) to about 5000. We exported our list ...
2
votes
2answers
279 views

PHP hack base64 code uploaded and sending mass emails

cPanel server with Exim MTA and Dovecot. Some hacker is finding old scripts at different users public directory, and uploading base64 encoded files then using it to send massive spam. How do I block ...
4
votes
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 ...
5
votes
5answers
1k views

HTML Entities to hide Email Addresses

I'm on WordPress trying to keep spambots from grabbing email addresses that may be in The Content. WordPress has a nifty little function simply called antispambot() which will convert the email ...