0
votes
1answer
96 views

How do botnets deliver spam? [closed]

I can't seem to find the answer to this question. I read that botnet bots are used as email relays (they have smtp servers installed). Wikipedia on Open mail relay: "(...)Internet initiatives to ...
1
vote
4answers
110 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 ...
0
votes
1answer
36 views

Email and Black Hole List Submission?

I'm having trouble with a spammer and would like to begin submitting their messages to a few black hole lists. Unfortunately, I'm having trouble finding a list. For example mail-abuse.org now ...
1
vote
1answer
108 views

My server was used for sending spam. Will our server ever be trusted again?

A while back I enabled SMTP on my IIS server with the intention of using it for internal email notifications. It seems that somehow hackers were able to use it for sending out thousands of spam ...
1
vote
1answer
62 views

Postfix periodic relay access denied

I administer an Ubuntu Server 14.04 which acts as a mail server running Postfix and was configured following most parts of this tutorial: ...
15
votes
4answers
2k 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 ...
1
vote
3answers
433 views

Email activation string with MD5'd random number and email secure?

For the registration on my PHP powered website, I require email confirmation. After a user registers, a string is generated with the following code and sent to their email address. $key = ...
4
votes
1answer
141 views

spam: several secret inboxes targeted at once. risk or coincidence?

I have a domain that is only used by me, with several inboxes in the format aep-x-company@domain , where i replace 'company' with wherever i sign up. This way i can detect when someone sells email ...
5
votes
3answers
478 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, ...
1
vote
2answers
297 views

How to Check if my mail is classified as Spam

I think several of mails are classified as spam.But Gmail and other Public Email providers has no issues. It might be a false positive cases with the associated tools Is there a tool or a way by ...
51
votes
4answers
3k 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 ...
1
vote
2answers
259 views

Email spam targeted at a pair of users

Two users on my domain are receiving spam emails that have both of their emails in either the To: and/or CC: fields. There are many other users on the domain, but only these two are receiving spam ...
2
votes
1answer
96 views

It it a good idea to whitelist inbound email using a Hash on the address? (Similar to BATV, but with DKIM)

Problem Statement I'm looking at ways to ensure that business partners, or emails from trusted senders, never get quarantined; ....in other words prevent "ham being seen as spam". Ideally this ...
2
votes
3answers
1k 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 ...
-2
votes
2answers
108 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 ...
-6
votes
1answer
161 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 ...
-1
votes
1answer
139 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 ...
-7
votes
2answers
118 views

Why my Email are received in the spam folder? [closed]

I am using Mass email marketing or shoot out email campaign but my subscriber received my mail in spam folder what are the reason of this and how can I prevent them. Question reference: Email ...
2
votes
2answers
11k 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 ...
10
votes
6answers
2k 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
398 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 ...
3
votes
2answers
798 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
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 ...
6
votes
5answers
605 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 ...
2
votes
2answers
145 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 ...
6
votes
4answers
5k 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
470 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 ...
3
votes
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
312 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 ...
1
vote
2answers
476 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 ...
7
votes
3answers
1k 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?
5
votes
6answers
3k 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 ...
5
votes
1answer
116 views

How long can I store personal information on unconfirmed subscriptions?

I have a monthly newsletter. In my subscribe form I use a double opt-in method: The visitor subscribes. I send him a confirmation email. If I receive a reply, I add him/her to my system. In the ...
2
votes
2answers
254 views

Is it unsafe to allow apps other than Outlook to send email via the Exchange server?

My application is a .NET Windows Forms client, one of whose functions is to allow the user to send personalised mailshot emails to opted-in recipients stored in the database. The emails are sent ...
0
votes
1answer
802 views

Email not received when sent by our app, received when sent by outlook [closed]

We have an application that sends mail in bulk, via a mail provider (Mailjet). Our clients are professional organizations, and they send important mails about meetings and stuff like that, to about 10 ...
7
votes
3answers
299 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?
5
votes
6answers
342 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 ...
7
votes
4answers
358 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 ...
31
votes
2answers
7k 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 ...
3
votes
2answers
266 views

Legal process for suing joejobber?

I'm currently being joejobbed, and want to sue the joejobber. Details: I have real damages: the joejob causes me to receive fake bounces, which: stop/delay my receipt of legitimate mail, since ...
6
votes
2answers
1k 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 ...