Questions tagged [spam]

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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49 views

What are spammers trying to acheive who only provide the correct contact information in their spam? [closed]

I've recently received 2 spam SMS messages, claiming to be from 2 different organizations, but (obviously) not sent by them. However, all of the contact details in the SMS match the real details of ...
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110 views

Bizarre email sent from spam email address with contact details of someone I know and a friend of their's in it [closed]

Someone I know (call them Darren Smith) recently received a rather odd email. It was sent to their personal email address, emailaddresswithnonameinit@emailprovider.com. The "From" field had "Darren ...
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158 views

Why would a stranger offer to write content for a nonexistent blog?

I get emails like this all the time: Hello dear, I’m a long time reader. I’m writing to you because I’d love to contribute a guest post on your website. I’ve been brainstorming some topics that I ...
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51 views

Spam email sign ups from HeadlessChrome?

I built a landing page with a "sign up with your email to get notified" sort of thing. The button executes some AJAX and submits to a PHP file which sends an email to me. Now, I'm getting a bunch of ...
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1answer
170 views

Would it be possible for me to become infected just by opening a Facebook message?

I received one of those obvious fake "is this you?" and some fake Youtube link on Facebook Messenger. I don't know what it redirected to as I didn't click it (I only hovered over it to see if it was a ...
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1answer
95 views

What's the point of spam posts where the link is too small to be visible?

Recently, a forum I frequent has received multiple spam posts on its general discussion board (three in the space of ten days). They all look like legitimate posts at first, but buried inside each of ...
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65 views

Are spam invites on Google calendar dangerous? [duplicate]

I was recently "invited" to win a free phone on my Google calendar. At first I was concerned that my account was compromised, but i think anyone can send a calendar invite. Is it safe for me to ...
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1answer
69 views

Phishing emails and securing set up from compromise?

I'm a one-man company and I'm getting a lot of phishing emails very similar to the emails from companies I use. Some of these companies and the emails we exchange are very unique. How would these ...
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1answer
135 views

Why do so many spam emails lately contain a lot of unicode characters?

I receive a lot of spam email (probably from recent breaches). A lot of them contain text that looks a lot like the below text: Why do they contain such weird characters? Is this part of an exploit? ...
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1answer
39 views

Rate limiting API with PBKDF2 challenge?

Assume I have a public API endpoint which I'd like to protect against abuse. I'd like to implement a solution that ensures that the client spends some computational time before allowing the request to ...
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34 views

Public report/telemetry API

I want to implement a telemetry data sender into my electron app. The API which I want to connect to is public. So any crash reports or any other data from the user is sent to it. The problem is how ...
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39 views

Emails Bypassing Exchange Transportation Rules

So here is the situation, we are trying to filter out spam emails within our organizations Exchange 2010 mail server and for the most part we have been pretty successful. Except for a few emails. ...
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What is this Russian calendar reminder that popped up?

I woke up this morning and saw a calendar reminder that I definitely did not put there, written in Russian. It would be super helpful if anyone knows what the text means, but I figured opening the ...
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1answer
136 views

Can someone text a photo to someone unsolicited? [closed]

I am being told that “all the new work phones for the security staff” are having issues with spam calls by my SO. I can buy that no problem, but this... He got a text message from a woman who said he ...
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1answer
45 views

Difference between local and central anti-spam

I'm attending a web security course whose slides, concerning techniques for protecting ourselves from spam, sometimes report the expressions "local anti-spam" (or "personal anti-spam") and "central ...
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1answer
40 views

Which benefits personal anti-spams bring w.r.t. e-mail provider's ones? [closed]

Assuming that an e-mail service provider is using an excellent anti-spam software, for what reason its users should employ a personal anti-spam?
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2k views

Failed to send emails that I never sent

Some months ago, I started to receive some emails from "Mail Delivery Subsystem" (mailer-daemon@googlemail.com). Despite this is "automatic" failure email, I thought these emails were spam, so I just ...
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89 views

Filtering Obfuscated Spam Emails In Exchange

So the past few weeks we have been trying to cut back on the amount of spam reaching our users in our organization. We have been successful in implementing hard filtering rules like if an email ...
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2answers
130 views

Do spammers use legitimate email marketing companies?

Every so often I will find myself on a mailing list that I know I didn't sign up for. This always gets me very cautious and I treat the junk mail as hostile spam - don't click, just delete and ignore. ...
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1answer
67 views

Finding location of malicious internal IP in Wide Area Network [closed]

Malicious Traffic detected from an internal IP in Wide Area Network (Network of multiple cities in a country). How to find the city of that IP address in Wide Area Network? There is no IP subnet by ...
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104 views

ML approach to malicious attachments using email contents

Based on my understanding of the field, it seems like there is a lot of attention paid to spam filtering based on the contents and metadata of an email, and there is considerable attention paid to ...
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22 views

What is the point of spam bots that re-post messages on other forums? [duplicate]

I frequent a low-traffic internet forum that has been dealing with some seemingly innocent spam bots that re-post messages from other forums. This is an example of such a message. It was posted in a ...
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1answer
98 views

How is typing “name at example dot com” safer than “name@example.com”?

Say I want to type my email address in a forum...say, hank.chief123@gmail.com. Obviously, that's a bad idea since spam bots will likely find it. So, I would just "cleverly" type hank dot chief one two ...
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4answers
108 views

How to stop people from spamming the account creation url on my website [duplicate]

let's say I have a website with an account creation form. How can I stop people from writing a program that automatically submits the form thousands of times, which would fill up my database with junk ...
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1answer
152 views

Strange spam to my IG and email with my secret information

I got strange email recently telling that i have an affair and it listed my visited cities with my boyfriend last year. Also threaten to share my relationship with others. Something that bother me ...
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58 views

Reduce form spam without external dependencies or false positives

I'm working on a Java Spring with a team and have been facing form spam issues. We are seeing a large number of requests that use generated & falsified information (ie everyone's names are generic,...
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305 views

Prevent spammers from faking emails being sent from you to someone else or yourself?

I received the following email with the headers below. How are the spammers exploiting this method of tricking users that their account is hacked? How can one prevent spammers from doing this with ...
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84 views

Friend got a spam mail with my name and location, after a google drive invite

Right after I sent an invite to a shared drive folder to said friends email adress, she received a spam mail featuring my name (the name I got on google account and my location (city). How does this ...
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2answers
166 views

How can I use Message-ID in header to screen (filter) Emails?

Recently started receiving torrent of spam emails immediately after ISP (Charter-Spectrum) switched to an upgraded Email system. Five of my ISP email addresses getting the same spam every day. Some ...
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1answer
212 views

Customer Email Hacked, Subject line “smtp-mail.outlook.com,587,<email>,<password>” [closed]

We've had someone break into our email mailbox - They have sent out spam to in an automated fashion. The only clues is that there is a sent email a few days before with a subject line of "smtp-mail....
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3answers
1k views

What is the point of spam mails containing nothing but random letters?

I recently started replying to spam (as proposed by James Veitch), logged into an old email account and noticed (much to my delight!) a couple of hundred spam mails. Oddly enough I stumbled upon an ...
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51 views

Gmail Contact List Safety

How can I know that my Gmail is spoofed or sending spams to other people I sent email to them before? I don't have clear signs of that especially my contact list is empty but I'm afraid this may ...
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1answer
76 views

Simple Mail Delivery Protocol (SMDP), where is it today? what do you think of it?

So I'm doing a research study on Simple Mail Delivery Protocol (SMDP) for those of you who don't know what it is, it's a new protocol for Email delivery that promises complete anti-spam filtering. ...
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195 views

Can just receiving or opening a spam email put my computer or emails data at risk?

Sometimes you receive some emails which are mostly (and correctly) categorized as spam email by your email provider and you are almost sure that they are in fact spams. However, you are curious to ...
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2answers
139 views

Why are email clients prevented from seeing the envelope?

Being able to compare the envelope values against the header field values is potentially useful for detecting fraudulent (e.g. spoofed) mail. However, email servers, when receiving mail over SMTP, ...
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1answer
57 views

Should I reply to e-mails that reached me by mistake (very low chance of being regular spam)?

My name is fairly usual where I live and my e-mail address is {first_name}.{last_name}@very_large_provider.com, so from time to time I receive what is very probably legitimate e-mails sent to me by ...
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1answer
138 views

Malicious Google Drive Links

Curious about a new form of spam I've noticed in my inbox. Someone seems to be using my email address to fill-out forms on sites, so that I receive the bounce back message. In this message there is a ...
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1answer
529 views

Peculiar Japanese DNS arrangement

I have been receiving spam emails on my many mails but specifically gmail from a .jp domain. I deleted the emails but today I decided to actually read one of those emails to see if they can send me my ...
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3answers
457 views

Is this a phishing email?

I've just received the strangest email: I don't understand why anyone would send an email like this. It doesn't look to be asking for credentials of any kind. Is this a scam which is designed for ...
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1answer
141 views

How are USSD messages used and who could send them?

Some illegal ads started showing up on my Android phone as message boxes recently. They are said to be "USSD messages" in an app recording notifications (com.evanhe.nhfree). There is a Wikipedia ...
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1answer
7k views

Is Mailbait still a threat?

Is Mailbait (or similar services) still a threat, was it ever a threat, and if so how can it be mitigated? Mailbait is that service that promises to fill up your email inbox by sending you a huge ...
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1answer
126 views

Why do they use misspelled names in spams?

I sometimes open my spam folder. Recently I discovered a spam, the sender name was somebody I know, but one letter in her name was changed from 'i' to 't'. Today I received a spam with this name again,...
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1answer
187 views

Spam link returns empty redirect to google.com - am I missing something?

In this question someone received what was clearly a spam link. Sometimes I'm curious enough to take a peek, which I usually do with curl or other command line tools (less risk of drive-by malware, ...
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1answer
87 views

Spam identification

We have a spamfilter running that does a very good job at tackling common spammer issues. From what it catches, I'm assuming it blocks mails based on a few things: SPF checks Certain attachment ...
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2answers
4k views

How did this email list a fake recipient? [duplicate]

My friend recently received a suspicious email for an iTunes gift card purchase from "Apple Store" with a header that displayed a fake "To:" address for orders@apple-store.com. Unsurprisingly, this ...
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1answer
80 views

Call and Unsolicited One Time Passwords

Context: I got a call from a US phone number from a guy claiming he was from a dark web website (something .onion, I can't remember) and he was calling regarding my "fake passport application". I ...
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1answer
641 views

Protonmail cannot read my mail — but can detect if it is spam?

All is in the title really. How can protonmail detect spam if if cannot read mail content? It could be based on metadata. But then spam detection would probably not be very good. And what metadata ...
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2answers
75 views

Can ISPs be helpful in preventing spam?

I have received a number of phishing emails from various domains. I would like to prevent the domain from sending emails so that other people also don't get taken advantage of. I have not been ...
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262 views

“Security through obscurity” is bad for security systems but good for spam detection. Why?

I was reading a request on meta Stack Exchange: A request for an informative popup before possible serial voting. It received two seemingly well-informed answers from well-informed users, and I've ...
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3k views

How to handle a Google security warning to a non Google email address?

I just received two emails from Google. The first one tells me that my password was changed, the second one tells me, that a windows device logged in to my account. All the links in the emails point ...