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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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Silence unknown callers on Macbook

I have silence unknown callers on in my iPhone. The unknown calls don't go through my iPhone anymore but still ring on my Mac. Is there a way to silence unknown callers on my Macbook?
stumped's user avatar
  • 131
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0 answers
85 views

Postfix: check sender IP but don't reject

I need to do the following with Postfix: when receiving mail from remote server, check sender IP with various blacklisting services (e.g. spamhaus or abuseipdb), but avoid rejecting mail automatically,...
Eugene's user avatar
  • 101
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0 answers
115 views

Multiple Domains, Single IP Blocked by Gmail

I have two domain names and 1 email server. When I send an email from my server to my gmail account, and then view the original message, emails from both domains are stated to: Pass SPF Pass DKIM ...
user10709800's user avatar
1 vote
1 answer
72 views

Stop occasional Thunderbird sound notifications for junk emails

Sometimes, but not always, a new email notification sound plays when junk mail is received. So far it is only for a Hotmail account. It is possible that some junk emails first go to the inbox and are ...
adatum's user avatar
  • 267
1 vote
0 answers
25 views

How to prioritise one domain name over others in rDNS?

I have a single remote server and multiple domain names. This server hosts webpages under certain domain names - say domain1.com - and hosts a webpage with an associated mail server under a separate ...
user10709800's user avatar
0 votes
1 answer
73 views

Does SORBS (DNSBL) contains domain names?

I’m researching SORBS (Spam and Open Relay Blocking System) and its function in DNS-based Blackhole Lists (DNSBLs). My question is straightforward: Is SORBS limited to storing only IP addresses, or ...
D.Bence's user avatar
  • 35
0 votes
1 answer
67 views

Outlook do not trusts sender

My Outlook 2021 Pro application blocks emails that comes from my colleague from particular domain. E-mail contains two png's that are company logo. Mail is moved to Spam. Trying to tell Outlook it is ...
vico's user avatar
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0 votes
1 answer
83 views

Privacy concerns related to OpenPGP (Email Encryption) key being searchable on key servers

I am considering configuring PGP (Pretty Good Privacy) in my Thunderbird email client to enhance the security and privacy of my email communication. However, I am concerned about potential privacy ...
Amit's user avatar
  • 260
1 vote
2 answers
738 views

What is X-Google-Original-From used for?

In connection with: https://unix.stackexchange.com/q/763097/101935 I am looking to understand what the use and purpose of X-Google-Original-From actually is. From what I see, I think I've managed to ...
Nicholas Saunders's user avatar
1 vote
1 answer
228 views

How to train an email server's junk filter using an IMAP offline client?

I frequently use offline email clients such as thunderbird and K-9. I also am trying to do a better job of training my email account's mail filter to more accurately filter junk email. I see ...
mherzl's user avatar
  • 173
1 vote
3 answers
91 views

Outlook: Is it possible to define a filter rule comparing a number in a header field?

In the mail I receive in Outlook, some service provider has set up a SPAM filter with a comparatively low level, tagging the subject with [SPAM] when the message is not SPAM in several cases. In the ...
U. Windl's user avatar
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-1 votes
2 answers
94 views

How does a message get back to a spammer? [closed]

I know that replying to a spammer is not a good idea. But I've always wondered how does a spammer receive the reply? I know that the data in the email header can be spoofed. And I can decipher some of ...
DoctorBrown's user avatar
1 vote
2 answers
663 views

Filter emails by sender address format in Outlook

For the past year I've been getting a lot of spam mail passing through the Outlook filter. The spam emails are almost all unique in content and wording, but they have one thing in common: the sender ...
Nermin's user avatar
  • 111
0 votes
1 answer
168 views

Marking forwarded third party messages as spam in Gmail without marking the forwarder as Spam

I have an Outlook web account that forwards emails to a Gmail account. The Outlook account uses a redirect mail rule to redirect messages sent to the Outlook account to the Gmail account so the email ...
ZenBalance's user avatar
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0 votes
1 answer
650 views

Junk mail get to inbox despite setting "Safe List Only"

I have Outlook setup with a Hotmail email address. To combat spam I have set the following setting in the Junk Email Options in Outlook: In Junk Email Options, Options: Safe List Only is enabled ...
RS Finance's user avatar
0 votes
1 answer
164 views

My emails are seen as spam by Gmail

I have a email server with postfix, dovecot, spamassassin, etc. www.mail-tester.com gives me 10/10. www.spamscore.net complains about the spf (SPF record SOFTFAIL) and reverse DNS: I have neither ...
tuxerri's user avatar
  • 11
2 votes
1 answer
2k views

Outlook: one-click-solution to block sender and mark as read / delete

Using Microsoft Outlook 365 (Version 2303) with Exchange Server from my university, I'm looking for a simple, one-click-solution for junk emails, which should do the following: first, block the sender ...
Pontis's user avatar
  • 123
0 votes
1 answer
655 views

Thunderbird has started to leave automatically flame-market junk in inbox instead of moving it to Junk folder. How to fix?

Thunderbird used to move mail that it marked as junk to the junk folder, but now many messages that have been automatically designated junk (with the flame marker) are left in the inbox. What's the ...
Jan K. Brueckner's user avatar
1 vote
1 answer
129 views

How enable the junk filter only in INBOX?

As the heading says: Is it possible (or at all necessary) to enable Thunderbird's junk filtering only in INBOX, i.e. disable it in all folders except INBOX? Please note that I am not sure whether TB ...
Binarus's user avatar
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1 vote
0 answers
102 views

Debian server getting spammed through

This server has been live for many years, however, recently it is under attack by spam. I have not been able to plug the hole they are using. It seems that the spam is using the sasl_username=clamav. ...
user150182's user avatar
0 votes
1 answer
256 views

Can I create rule to filter all mails to spam except [email protected] in Outlook [duplicate]

In Outlook I want to create a rule that filters or forwards all emails except the one from my organisation domain (eg. ***@company.com). Any rule which can block or move to spam others apart from ...
dhruv1000's user avatar
  • 101
0 votes
2 answers
116 views

Is it possible to create an Outlook rule to send all messages to junk if a certain header is missing?

We have a spam filter that adds a header that indicates that the message has gone through the filter. In the Outlook client, is it possible to create a rule that sends all email to the junk folder if ...
Curtis's user avatar
  • 123
0 votes
1 answer
34 views

make outlook use restricted view on spam messages also after moving to deleted items folder

i'm using outlook 16.0 as part of the microsoft 365 subscription. currently i'm on version 2210. spam messages are moved to the "junk email" folder. those messages are getting displayed in ...
paulgutten's user avatar
0 votes
2 answers
675 views

Automatically filter security-test spam on Outlook web version

At work our security department frequently sends fake phishing mails to see who is dumb enough to click them. All these mails originate from the same server (smtp.mailfrom=psm.knowbe4.com). Is there a ...
Dakkaron's user avatar
  • 146
1 vote
1 answer
710 views

Transportrule -> Text Pattern Regex to capture domain and subdomain

I'm running an On-Premise Exchange 2010 with the following Transportrule checking for Text Pattern on Sender Address: ^.+@(?=.*microsoft)(?=.*.com).*$ Above Regex gets captured if "microsoft&...
Steven Borges's user avatar
0 votes
1 answer
648 views

Mark an email as spam that contains javascript tags (advanced spam filter)

I was currently testing the setting of Office 365 anti-spam inbound policy. I am having issues with some settings. Here they are: JavaScript or VBScript in HTML MarkAsSpamJavaScriptInHtml Messages ...
Surya's user avatar
  • 11
2 votes
1 answer
206 views

How to remove the random stock images from Windows 10's search pane?

I'm on Windows 10 Pro 21H2 version. In the last few days, my search pane started to present some random stock photographs (mainly landscapes, I believe) (from Microsoft Bing) upon opening it. I find ...
Levente's user avatar
  • 247
1 vote
2 answers
5k views

Control email sent on behalf of different address with Outlook Rules

I frequently filter spam by domain from companies that do not respect "unsubscribe". In Outlook, I use the rules wizard to set a rule where specific words ("@rudecompany.com") ...
Matt's user avatar
  • 138
3 votes
1 answer
5k views

Remove new type of ad on Windows 10 search bar after Windows update

After a recent windows update this ad is now showing up on the search bar It a small button on the right of the search bar, and if you hover (or click) over it it shows a panel as shown How do I get ...
user13267's user avatar
  • 1,681
1 vote
0 answers
213 views

rkhunter Apache2 Warning caused by phpmyadmin-Docker-Container

recently we get the following reports from rkhunter: Warning: The following processes are using suspicious files: Command: apache2 UID: 33 PID: 11286 Pathname: Possible ...
peter.testi's user avatar
0 votes
1 answer
621 views

How to extract email addresses from an E-Mail folder on the server

I am now in the situation where I need to complete my Rspamd Blocklist with the domains that are spamming me. As I cannot do this direct from my inbox, I have now the following setup: I mark all ...
Vlad's user avatar
  • 133
0 votes
2 answers
598 views

How block mails with certain content before moved to spam in outlook

I am getting spam mails with always the same content (and the same subject). They are sent each time from a different address. Outlook always automatically puts them in the Spam folder. However, I ...
Riemann's user avatar
  • 103
2 votes
1 answer
90 views

Is there a way to configure Thunderbird with malicious IP DB to flag incoming mails as spam?

I checked a spam mail source and noticed it could come from a malicious server. I saw there are some malicious IP DB like AbuseIPDB collecting such IPs. Is there a way to let Thunderbird check the IPs ...
Amessihel's user avatar
  • 355
0 votes
1 answer
705 views

Will an unknown or missing DKIM, SPF, or DMARC parameter always cause an email to be marked as spam?

I recently found that an email provider I use is unable to send email to some popular systems like aol.com, verizon.net, (and perhaps others) without being marked as Spam. I became suspicious after ...
Nedd's user avatar
  • 103
1 vote
1 answer
265 views

Clear Thunderbird junk folder or leave the messages in?

Do the mails in the Thunderbird Junk folder serve any purpose, e.g. training data for the adaptive filters? Or can I throw them away? Related but not containing my answer: How does Thunderbird "...
Jan Doggen's user avatar
  • 4,247
0 votes
1 answer
172 views

unauthorized access to dovecot services

Recently i was enable mail-relay to 3rd party tool, suddenly i found 1000 of emails are going as a spam everyday to unknown users i disable the mail-relay ,but still we facing some one login our ...
Ana Mal's user avatar
1 vote
2 answers
847 views

Manually move marked junk mails to junk folder

Is there a way to manually move junk mails to junk folder in Thunderbird? I have multiple email accounts configured in Thunderbird with enabled adaptive junk mail controls for each account, enabled &...
jabaa's user avatar
  • 132
0 votes
1 answer
3k views

Office 365: daily quarantine reports

I am looking to activate a daily quarantine report for all users under Office365 but can't seem to find the option in the new layout. It is no longer available under the "classic exchange admin ...
Ken's user avatar
  • 101
0 votes
0 answers
269 views

SpamAssasin TLD blocking

I have configured spamassasin in my hosting to block some spammer TLDs. The blacklist email is just as this: @.asia @.bar @.best @.bid @.buzz @.cam @.casa @.cloud @.club @.cyou @.diet @.digital @.fun @...
NoSignal's user avatar
0 votes
2 answers
293 views

spam email sent from my exchange account but not in my sent items

we have an issue where we are receiving emails from contacts that they have received emails from our users that contain dangerous links in the email. The email being sent is from a previous email ...
scott cottingham's user avatar
-1 votes
1 answer
94 views

How to eliminate public listing of my email address? [closed]

I get way too much junk mail that I am not thinking of ditching my email address. I am think it is in part because my email is publicly listed somewhere? Can I search my email listing on google etc so ...
zar's user avatar
  • 1,753
0 votes
1 answer
298 views

I have received a E-mail and the ‘To:’ address is not mine

I have just opened my Mail app on my phone and have noticed a strange email at the top of my mailbox. I am from the UK and the sender of the strange e-mail was from a .de Address. I have no reason to ...
Jackled's user avatar
0 votes
0 answers
201 views

Outlook.live.com - does opening a junk email trigger Open message tracking?

Generally, when mail providers place a suspected spam email in the Junk folder, and then a user opens that email, the content is blocked from loading so as to avoid triggering an Open email event in ...
Ahmed Tawfik's user avatar
0 votes
1 answer
582 views

When I mark an e-mail as "Not junk" in MS Outlook, does this in any way get communicated to Gmail?

I use Gmail's servers, and Outlook (Windows) as my mail client. I occasionally get false positives identified as SPAM, requiring me to check my Spam folder regularly. When I see a legitimate e-mail in ...
Chris Melville's user avatar
0 votes
0 answers
201 views

307: hackers temporary redirect for javascript files

I have an http website, hosted by the service provider. My web pages load javascript files from the web server. Well, really standard scenario, but... When I am at home, and load web page from my web ...
Anonymous's user avatar
  • 161
2 votes
1 answer
670 views

Risks of custom domain for personal email address?

I am not speaking of hosting the web server myself, I would delegate that to a well established company, for example the registrar I use for the domain name. I want to know what the risks would be to ...
Gabriel Devillers's user avatar
1 vote
0 answers
441 views

header_checks is applied to mail body (CentOS 7 + Postfix 2.10.1)

I have received SPAM e-mail, added regular expression to header_checks about it and when tried to forward SPAM e-mail as attachment, then this check triggered and rejected my forwarded e-mail. Regexp ...
dmmedia's user avatar
  • 317
0 votes
1 answer
37 views

When allowing a sender or sender domain in outlook does that apply to the "via" as well?

The company I work for sends emails for an internal email, but it is sent through a third party service and is authenticated with our domain. Surprisingly, one of our emails ended up in my junk folder,...
TJR's user avatar
  • 101
1 vote
2 answers
272 views

detect spam from random domain names in header, in .procmailrc

Spam from a well-known organization that sells large lots of knockoffs of everything from drones to roombas uses random domains in the From:, Message-ID:, and Reply-To: fields, all different, without ...
Camille Goudeseune's user avatar
2 votes
0 answers
466 views

My e-mail is being used to send spam, what can I do?

I am renting my own domain from a German hoster, and have created 4 e-mail accounts on it. All was well for 5+ years. For about a week now, one of those accounts receives around 5 e-mails per day from ...
Alexander Engelhardt's user avatar

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