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Questions tagged [spam-prevention]

Generally refers to techniques that aid in avoiding receiving any email or message that is either unwanted or unsolicited.

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Google Analytics Bots Spam Issue - Direct Website Visits [closed]

All these spam bots are visiting our site and they all are direct website visits then leaving the site right away. It's different than a referral spam bot issue as you can easily block that but ...
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22 views

White list my company email at customer's inbox [duplicate]

I've a webhosting company, all my emails are sent to customers spam or junk folder. I'm using SSL on my website, is there any way to make my messages go to customers inbox instead of marking it as ...
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How do I make Thunderbird automatically mark as spam all emails which have any emoji characters in subject line?

This year I've started receiving spam emails which are very easily identified by containing emoji symbols in the subject title. I tried filtering them one by one, but the spammers just keep using new ...
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1answer
34 views

How to effectively filter spam emails that have two '@' symbols in the address?

Apologies if this has been addressed before. We are seeing a companywide uptick in spam emails with attachments that use the following syntax for the 'From' email address (I apologize again that this ...
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55 views

Outlook 2016 Pro Plus Digital Signature issue

in my organization there are 50 clients, circa (Windows 10). On 8-10 of these, there's a single mail account configured with IMAP in Outlook 2016. From 15/10/2018 some emails from inbox automatically ...
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Monitor Barracuda email spam filter

I'm searching to monitor my Barracuda Email Security Gateway, particularly the average time to deliver an email (Average Latency Time on the dashboard). In parameters I see no SNMP access, so how to ...
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2answers
96 views

postfix/dovecot, other domain is using our server to send spam

Our server is being used to send spam from an account that doesn't belong to our domain. This account is sending emails to other domains and it is affecting our IP reputation. log: Nov 20 06:31:42 ...
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1answer
39 views

Work emails going to recipients SPAM folder instead of inbox

I am having an issue with emails coming from my employers email domain (@poweron.com) ending up in recipients SPAM folder instead of their inbox, here are the details. On monday, the sales manager ...
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2answers
385 views

Group policy to block office macros

my organization has a windows 2016 server standard edition and i'm wondering how to go about adding a group policy to block office macros. I've seen a lot of other posts using user config > ...
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1answer
71 views

Specific emails always go to Junk Email in Outlook

I receive status emails from my Websites regularly that Outlook always sends to Junk Email, even though I've told it to "Always trust emails". The emails are from WordPress wordpress@<mydomainname&...
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1answer
303 views

How to find the Chrome extension that opened a spam website?

Currently I have a weird problem: I do a Google search and probably once a day, one of my clicks onto a search result does not lead to the target site but instead opens a spam site. Today's example: ...
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1answer
47 views

Stop Thunderbird from spam filtering

I am using Thunderbird version 38.5 as an email client and it apparently keeps routing messages to a "Spam" folder. I have all junk settings turned off for this account (as shown below), but it still ...
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1answer
80 views

How can I filter email messages in Alpine v2.03 email client?

In my school, our web admin gave us a text-based email client to manage our inbox. This client is called Alpine. Its productive version is 2.03. We have a lot of spam in our inbox, but I cannot ask ...
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85 views

Does spam-marked email effect reputation if server is whitelisted?

I send email via SendGrid from outside a company to many employees from one company. This company whitelisted the sender IP address, so that no email we send is automatically marked as spam. If some ...
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61 views

Gmail detecting mails as spam [Postfix]

I am running an ispconfig web/mail server and the problem is that my mail ends up in spam at google. I have everything set up rDNS, DKIM, SPF, dmarc, so i dont think that the record part would be an ...
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182 views

recipients have complained about included content (b-url)

We are sending a bulk email to our customers because we changed our privacy policy in accordance with GDPR (Europian law). We are getting a lot of bounces from english and german customers with the ...
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1answer
122 views

Why internet traffic behind ISP is not subject to captcha like a VPN?

When I'm using the internet from my ISP 'directly' (I mean with no VPN or proxy), I can surf the web freely and almost never encounter a captcha but as soon as connecting to a VPN service, captchas ...
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32 views

Is there a adaptive junk mail control in the Outlook 2016?

I have been using Thunderbird for several months, its "adaptive junk mail control" helped me avoid a lot of spam emails. But recently, I started using Outlook, but I can't find the similar setting. ...
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1answer
49 views

Our emails are always going to gmail recepients spam folder [closed]

Everytime we sent a email from our Business email account gmail are marking our emails as spam and emails are always going to recepients spam folder. I tried to send email to gmail from webmail ...
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1answer
733 views

All name servers should resolve to IP addresses

when i check my domain for spam in https://toolbox.googleapps.com/apps/checkmx/check?domain=mydomain.com i am getting error All name servers should resolve to IP addresses. Name servers that don't ...
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500 views

Emails to a specific address are bounced

I have been having issues with my emails to a particular client being bounced. I sent two emails today - the same email to two mail addresses in the clients .com domain. The first was sent to fred@...
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1answer
286 views

Why my emails go to junk folder?

I registered a new .xyz domain name a few days ago. The domain name was never registered by others before. I set up a postfix server on a clean ip(checked its reputation). I set up SPF, DKIM, and ...
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1answer
26 views

Black listing methods for spamming emails [closed]

If someone gets access to your server and setup an e-mail spam service. Will the online black listing services than block this individual ip address that this server uses, or will they black list your ...
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94 views

chrome is getting redirected to some ad website

I am not able to understand what is happening in my laptop. I open a any website like http://www.omnisecu.com/cisco-certified-network-associate-ccna/cisco-router-interface-configuration-commands.php ...
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39 views

How to setup a whitelist for my exchange email account where everything else goes to trash

I have a super generic email address at a giant corporation. Every day I get hundreds of emails from spam, sales people and other companies wanting to "connect", so much so that my email is completely ...
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1answer
35 views

How to detect if an Email was sent with Tracking Software?

I'm seeing more and more blank or meaningless SPAM emails (No attachment, link, Advertisement, or Phish attempt) sent to my employees. I assume they are sent with tracking software just to see if ...
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1answer
5k views

Receiving thousands of “Mail delivery failed: returning message to sender”

I am receiving thousands instances of the following error message: "Mail delivery failed: returning message to sender" I research this problem and it seems that someone has sent a bunch of these e-...
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2answers
102 views

Preventing spam website to open tabs, popup and url automatically

If you visit https://1337x.to or https://ilcorsaronero.info/cat/1 with Chrome (v. 62.0.3202.94) some pages will be automatically be opened even if the popup setting should prevent this from happening. ...
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1answer
68 views

RSS feed GET spam causes server CPU to run at 100%

I just transferred my site over to a new host and am seeing a tremendous amount of RSS feed spam. Inside of my Apache logs I am seeing a bunch of GET requests to an RSS feed URL that doesn't exist (...
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1answer
83 views

Junk Mail folder in Outlook 2016 with MS Office 365 Pro Plus

For my corporate email, I use Outlook 2016 version 1705 on Windows 10 - This is the Outlook I download using the subscription of Office 365 Pro Plus. Is there a way to block email ids or domains ...
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711 views

Microsoft Outlook/Office 365 create and run script to create rule on all emails in a folder

TL;DR look at the stuff in bold. My university uses Office 365 for its email services. Unfortunately, either I accidentally put my e-mail out on some malicious site or someone who doesn't like me did....
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52 views

I'm confused on which Spamassassin setup to go with? [closed]

I have successfully installed a Postfix/ Dovecot mail server which I already went ahead and setup SPF and DKIM checks, along with signing my own mail. So I thought the next step would be to install ...
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1answer
285 views

How can I filter emails by IP in Thunderbird?

I use Thunderbird for my email. As of lately, I'm constantly receiving plenty of spam from the same block of IP addresses. I cannot block them at the firewall (neither my own PC's firewall, nor the ...
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32 views

Thunderbird - How to filter spam by title?

The spam filter in Thunderbird does not work at all. I always mark spam e-mails since weeks as spam, but I get the same spam e-mails over and over again (how long does Thunderbird needs to be 'trained'...
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38 views

what sort of mac/chrome hack could produce this kind of spam?

this is obviously spam. things like this happen randomly, but not often, on this macbook (el capitan) in chrome (61.0.3163.100). I have no idea where to start looking. I installed malwarebytes, it ...
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1answer
70 views

Email sent via domain name address rejected as spam

I'm new to the site and this is my first question. I hope it's OK to post here as I'm not an administrator, just an ordinary computer user! This is my problem - For my work, I use an email address ...
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59 views

server send spam mail through gmail connection

i have a batch of spam mail sent by my server (ubuntu postfix /dovecot) in my log i see that gmail (account is linked) connected and sent the mail ? what should i do to prevent this ? Jul 31 12:27:5 ...
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2answers
100 views

is our dynamic IP causing our mail to go into spam, despite clean mailserver?

Recently, we are having contacts reporting our usual business email going into their spam folder. For sending email (with thunderbird), we connect to our email server (hosted by webland.ch) using a ...
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2answers
149 views

Warning : Zeus Virus Detected

It happened many times to me and every time I lose some unsaved work. Some times I open a website that it will automatically takes me to a spam site that shows a message box that says Warning : ...
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1answer
33 views

How do I know I've marked a message “not junk”?

Thunderbird's documentation regarding the junk filter indicates that in training the filter it is important to advise Thunderbird as to what messages are not junk as well as what messages are. One ...
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76 views

In DMARC report other IPs than mine fail check, but disposition is always “none”

I have trouble to understand the DMARC reports I receive. In all reports, I get some IPs that are not mine sending a couple of emails, fine, their checks (SPF or DKIM) always fail, but still the ...
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1answer
31 views

Creating filter which sends error mails back [closed]

In the next year I want to set up a personal email server with custom domain etc. For spam issues, I want to create an email filter which sends in case of spam the exact same message back, like it ...
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32 views

How can I limit the number of mails sent from a specific email account in cpanel or WHM

I have a spam issue with an email account. Undelivered emails are being returned to the mail box. These emails were not sent from the box. Its seems someone or something is bouncing the emails off ...
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60 views

MS Outlook: Delete mail when manually marked as junk

When email fails the junk filter and shows up in the inbox, if one marks it as junk, it still goes into the junk folder. It would be nice if that action would cause the message to actually get deleted,...
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2answers
775 views

How to reliably block “Come here often ? Make Google your home page.” popup?

When I do google search I see this popup from time to time on search results page in upper right corner: From this question on SO I knew that it's appearance depends on cookies set by google and ...
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1answer
76 views

Ubuntu with plesk 17 spamassasin not working

at the moment I got very much spam mails. All of them are polish and have a spamscore of more then 5.5. So I thought yeah easys just adjust spamassasin in my plesk panel to 5 and the spam is ...
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1answer
173 views

Receiving a loads of bounces of spam that we didn't send. How to stop this?

We have a mailbox that receives thousands of bounces from spam messages a day (for 2 weeks now). The spam is send with the from and reply address of the our mailbox in the headers. The spam is ...
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1answer
827 views

How to block domain and domain extensions on Outlook 2010

I am getting everyday tremendous amount of junk mails. Some of the senders are as follows. affiliate@smtp17.cpamonday.com affiliate@smtp22.cpamonday.com affiliate@smtp36.cpamonday.com affiliate@...
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1answer
777 views

Mail forwarding: Do I need to concern myself with the SPF fail header from Google?

I'm using a Postfix mail server to forward personal mails from an EC2 instance to a Gmail account. To prevent Google from considdering me a source of spam I have set up all the ...
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1answer
810 views

spamassassin - filtering specific Cyrillic/Russian UTF-8 letters (base64 encoded)

I am having some trouble setting up my personal spamassassin rules. My problem: I get a lot of Russian spam with Cyrillic letters, many in UTF-8. Because of that, searching for a charset is not ...