AntiSpam

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Various techniques are used to prevent email spam (unsolicited bulk email). No technique is a complete solution to the spam problem, and each has trade-offs between incorrectly rejecting legitimate email (false positives) vs. not rejecting all spam (false negatives) - and the associated costs in time and effort. Anti-spam techniques can be broken into four broad categories: those that require actions by individuals, those that can be automated by email administrators, those that can be automated by email senders and those employed by researchers and law enforcement officials.

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User was tricked at home, he took the whole bait and hook, paid $ to a fake Microsoft person and allowed them on his computer. Anyway after running some tools and removing malicious malware he still has on his desktop a fake phone number that shows on his Task bar area. This is a Vista O.S. how do I remove?
I will be reformatting the computer in a  couple week.
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Hello,

I am doing some testing of spam filtering solutions. Is there a service that will just send you spam to an email address? Thanks.
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Dear Experts,

My clients and I tried to send emails to proofpoint customers but they get deferred or delayed.

I have done a blacklist check and our IP address is not blacklisted.

Is there anyway to contact proofpoint and inform them about this and get it resolved?
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Hi All,

Could I ask for your recommendations please. I am having lots of problems with loads of spam at the moment on my server.  I used to run AVG on the server but still my clients had far too much spam getting through.  Can you suggest what is best.  I only have a small network of 10 clients and 1 server and limited budget.  Have been attempting to get BitDefender but their customer service is poor at the moment as I have been awaiting a call back for 2 weeks after several chase ups.

Have tried using the spam setting within my Windows setup but changing the setting makes little difference.

Many thanks
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Hi Guys,

We recently acquired the Antispam (CASS2.0) for SonicWall TZ400.
The feature has been installed and configured, but not yet enabled.

I just need some basic understanding and information from someone re the TZ400 Antispam feature.

1.  Our mail does not currently spool via the TZ400 router, it comes via another gateway.   I gather that we have to change our MX to route mail via the TZ400 for the antispam feature to work?

2.  Once mail packets pass via the SonicWall router, will the TZ400 pick up the mail traffic from the NAT rule for port 25 automatically?

3.  We will be using the current gateway as secondary MX (fail-over).  Any other suggestions regarding the config and first hand experience?
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I am at wit's end with something that I cannon understand is happening.

My boss signed -up for a newsletter from a website called "fisherynation.com". This news sites send several email out per day and they will not go into my bosses Outlook 2016 Inbox but rather to the Junk-Email folder. Here are the steps I have taken:
- In Junk Email Options, set to "No Automatic Filtering"
- Added fisherynation.com domain to "Safe Senders List"
- In Outlook Web Access (OWA) under setting for "Block or Allow" is set this to: "Don't move email to my Junk Email Folder"
- In Exchange Administration, Mail Flow.. I created a "Bypass spam filtering" for the sender of the emails in question.

Noe of this works! This particular sender of email is the "one and on;y" emails to go into his Junk Email folder. nothing at all besides.

Maybe this is a bug in Outlook 2016? Any ideas anyone?

Sincerely,
Steve
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Hi, I have a justspam.org issue. Our WP web server has been compromised and has been infected with a spam-sending virus. We have cleaned the infection but we got to many spamlists including justspam.org. The problem is, that we have never used this server (IP) as a mail server and we are using google services (not only) for emailing. We have made actions to block any smtp traffic from or to our web server. But that aslo means that we are not able to send de-listing email from our  IP.  This is a "catch 22 situation" when we are not able to send mail from that ip but the justpam.org server still keeps record that we used to spam and some of our customers' mail servers deny our mails as spam because they check our domain IP which ends on this IP... . How to get out of that? Is the only way to start webserver on that IP and send delisting mail? I would really hate to do that...
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Currently our Proofpoint can take from a few minutes to 3 hours before it detects new
emails containing certain attachments & links (ie new threats) are 'malicious' or spam.
To claw back malicious emails 2-3 hours later is rather late. Wud rather have late delivery.

Our Bluecoat MAA that protects against malicious downloading (or malicious sites) can
take up to several minute : just encountered one case yesterday where malicious .eot
files were downloaded by several users before it blocked users from downloading.
This Bluecoat MAA is supposed to protect against 0-day and unknown threats as well
but we have got quite a few infections/downloads in the past: possibly its 'sandboxing'
is not real-time / fast enough.

I'm hesistant to deploy endpoint IPS (HIPS) on workstations at this moment so skip
this for the time being as HIPS can impact legit services/apps if not tested thoroughly
while network based tools like MAA (& Trendmicro Discovery) are less disruptive.

Besides educating users (which we have done quite a lot), I'm looking for sandboxing
products that could perform much faster : I read one academic article that products
that implement 'prefetching' using multi layer of caches are much faster.  If they use
SSD, wud it be faster?

In particular against ransomware as one highly successful one as extracted below:

Sky News Technology Correspondent Tom Cheshire described the attack as "unprecedented". The ransomware appears to use NSA 0-day …
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Some (not all) spam emails are not detected by the DNSBL filter.
In the hMailServer log I can see:
DNS lookup: 200.197.98.172.zen.spamhaus.org, 0 addresses found: (none), Match: False

But, if I try to execute the following command:
host 200.197.98.172.zen.spamhaus.org
it does return a match:
200.197.98.172.zen.spamhaus.org has address 127.0.0.3

The hMailServer's spamhaus entry is configured as follows:
<DNSBlackList Name="zen.spamhaus.org" Score="3" RejectMessage="Rejected by Spamhaus." Active="1" ExpectedResult="127.0.0.2-7"/>

Open in new window


We are using local Windows Server DNS service for caching and I can't find the missed DNS requests in the cache.

How that could be fixed?
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I was asked to start researching a replacement for our Barracuda Web and Spam filter. We have roughly 2k exchange users. I understand spam can be due to user behavior on the internet, so I know if we change our solution but users don't change their habits, then we are just trading off for a different set of problems/issues/complaints. I did some preliminary research on the net but see a lot of outdated articles and product promotions.

Anyone have any suggestions as to a good/better solution than a barracuda web and spam filter?  

Thanks in advance for any input you may offer.
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Can anyone help me in writing a powershell script that will do the following please:-

- Check e-mail server if down then report e-mail server down
- If e-mail server is up then do the following:-
    - send bulk e-mails to users from a csv file - contains the headers (first name, lastname, e-mail) with an attachment file
    - check/confirm e-mails are sent
    - If during the process, e-mails are failed, report this. re-attempt to send failed e-mails up to three times
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Dear All Expert,

I have install and configure Zimbra Mail Server already. Now I want to improve security on my Zimbra mail server. I want to make sure my Mail server was protected with spam, so I decide to integrate SPF, Razor and Pyzor but I meet an error after I installed those. After I installed SPF, Razor and Pyzor, the service spamAssassin in zimbra cannot start. It seems the instruction I followed was wrong.

So, Can any one tell me how to integrating SPF, Razor & Pyzor to Zimbra SpamAssassin In Ubuntu 16.04?
I really need your help very urgent.

Regards and Thanks,
Chanveasna Tep.
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O8EKCO@itlgopk.uk
Is this some kind or email address if so can you tell me who it belongs to and why it showing stuff off of my email and my boyfriend email and what it is and how I can look at the stuff.  The other emails I'm questioning are krystalmiller685@yahoo.com, jlee551311@yahoo.com , leej8286@gmail.com , krystalmiller457@gmail.com. And ljohn481@yahoo.com
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What is the best Spam filter for exchange 2010 which is hosting other companies email domains?
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As of Dec 1, 2017, Cloudmark is abandoning their DesktopOne product which was a very good spam filter,  One "Pro" license allows you to configure multiple accounts to filter.  It works by using IMAP to look at messages and leave them alone if not spam, or move them to a spam folder if they ARE spam, so any email account that uses IMAP can be configured.  I have ten or twelve accounts configured.  

There are three criteria I would like to satisfy
1. the application scans email on the mail server using IMAP (as opposed to scanning as the message comes into the email client on the user's computer)
2. it allows for multiple accounts to be configured.
3. it installs on a WIndows machine (this one is negotiable - I don't know Linux that well, but with the right user guide, I can work through it)

I will also entertain offers to have a spam filter "server" built for me

Thank you in advance.
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I host with Blue Host
after I bought   www.seattlesurveillance.com on the web
I am getting a non stop barrage of spam from China, Korea, Japan
offering wholesale pricing

I already have a supplier

Does anybody know how I can block incoming spam
based on *.extension or IP range xxx.xxx.xxx

I cannot keep erasing 10 to 20 spams a day


Thanks !!!!
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Hello friends ,

I know it is impossible to give a 100 percent guarantee for that . But is there any to do list for general rules at least to do %80 - 90

For ex.
SPF
Dkim
rdns
Mail container's email count per send

Gmail's sensitivity's
Hotmail / outlook sensitivity's
....
etc
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Hello friends we have 20K + public ipv4 and we should be aware of check all ip addresses in all spam lists.

Is there any tool / php script that check all spam lists for all ip addresess and help to remove from them ?
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I have a bunch of domains that my office use for their signatures.  For some reason, 1 of them which is fairly new, a year old is causing emails to come back blocked.  I've tried searching the blacklist sites and putting in the domain but they show that everything is fine.
I know for sure Charter, Verizon, and a few others are blocking this, but I'm not sure where to start.  
Just to be clear, the email address isn't being blocked and all is good, but a web link in their signature is causing the email to be blocked.  There is nothing wrong with the link, what's typed is where it's going.
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we are using External MX level spam filtering for zimbra 8.6 . can we block all connections except MX & internal user's (local domain) connections from sending emails to zimbra server.
which means: should only MX records can send mail to zimbra server. any other domains should not connect to zimbra server which bypass MX level spam gateway.

any help would be greatly appreciated.
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AntiSpam

4K

Solutions

5

Articles & Videos

6K

Contributors

Various techniques are used to prevent email spam (unsolicited bulk email). No technique is a complete solution to the spam problem, and each has trade-offs between incorrectly rejecting legitimate email (false positives) vs. not rejecting all spam (false negatives) - and the associated costs in time and effort. Anti-spam techniques can be broken into four broad categories: those that require actions by individuals, those that can be automated by email administrators, those that can be automated by email senders and those employed by researchers and law enforcement officials.