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AntiSpam

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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We are providing antispam service to few clients using our builtin antispam in our server.
Now customers requesting for interface to release the quarantined emails.

Is there any antispam software you guys know which can provide interface and filter spams?

Thanks
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Free Tool: SSL Checker
LVL 11
Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Our main domain for mailservers has been blacklisted by Spamhaus.
I have not received any complaints prior to this (24 hours ago).
Spamhaus do not let me delist, the domain has been flagged for manual delist (whatever that is), and I did that 24 hours ago, but until now, nothing from Spamhaus.

Anyone knows how to get out of that blacklist, or to get sem response from Spamhaus?

/Jan
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Hi There,

For the past few weeks users on my network and users they typically email have been complaining about receiving a lot of spam from our users.  I have gone around to every computer and ran malware cleaning tools such as malwarebytes, superantispyware, ccleaner, adwcleaner, antivirus and so on.  I have found many problems and removed them but the spam will stop for a few days then suddenly come back with a ton of emails.  Our email is hosted by an outside company like godaddy and it is pop.  We don't have a good firewall yet so i can't scan the logs of the firewall.  Is there another way to scan the network to detect which pc has the spambot infection and do you know how to remove the virus.
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Most of my organisations emails are being bounced back even though they are not listed on any blacklisted site, they are predominantly 365 users.  They are being bounced back with a security issue.  Even if I try and send an email to microsoft to delist I get the following message 550 5.7.1 TRANSPORT.RULES.RejectMessage; the message was rejected by organization policy.

Not too sure if any one else has had the same issue.

Thanks
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Hi,

We are using ESAT spam filter and we have a user that is getting spam reports with duplicate emails in them.  

eg.

email is caught in spam filter, it is in the spam report that the user gets
- user retrieves email from the filter
- he gets the email

Next spam report, the same email is in there but the person did not send the email again since it is exactly the same

Has anyone used this spam filter program?

Thanks
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Hi

I have a setup with SpamAssassin, postfix, dovecot and a few other components.
I've set up user_preferences, so they are now loaded from mysql db using the user_scores_dsn etc. settings.

I have created a table in mysql for local Rules (header, body etc) and included them in the user-preferences lookup.
However - I cannot get them to work.

I have added the allow_user_rules and set it to 1.

This is my database connection settings:
allow_user_rules 1
user_scores_dsn                  DBI:mysql:mail:db-server:3306
user_scores_sql_password         <left out>
user_scores_sql_username         mail
user_scores_sql_custom_query     SELECT preference, value FROM spamassassin WHERE username = '$GLOBAL' OR username = CONCAT('%',_DOMAIN_) OR username = _USERNAME_ ORDER BY username ASC, priority asc

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this query returns something like this:
Preference column:
  • use_bayes
  • bayes_auto_learn
  • blacklist_from
  • header LOCAL_H_FORBIDDEN_WORDS_SUBJ_SEX
  • score LOCAL_H_FORBIDDEN_WORDS_SUBJ_SEX
  • describe LOCAL_H_FORBIDDEN_WORDS_SUBJ_SEX

with corresponding values in the value column:
  • 1
  • 1
  • *@bejoqq.org
  • Subject =~ /sex/i
  • 4
  • Bad Word

Is there anyway to have all my rules stored in my database?
It's much easier to maintain her accross multiple servers etc.
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Hello ,

I imagine that if there is a transparent anti spam server works like in a topology as this :

------------->   SERVER BOX ---------------->  Switch ----------------> Hosting / Mail ...etc. servers.

I want to know if there is a software that works without creating config for each domain / mailbox will handle the mails and send to the servers if they are not spam
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Hi All ,

Quiet frequently I'm getting below mentioned error on my barracuda spam filter on out queue mails . The error message is

 "Deferred: conversation with 192.168.77.189[192.168.77.189] timed out while sending message body" .
 
192.168.77.189 is NLB interface of my 2 CAS servers (Exchange 2013 on server 2012 ) . Some days the queue goes up-to 300 mails and goes off in 1-2 hours by itself .

communication between barracuda and the cas server is stable .i couldn't figure out the issue yet . I have contacted barracuda support and they asked me to contact MS as its an issue with the exchange side. can somebody help me out to resolve this issue .

regards,
Sharaf
barracuda.jpg
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Hello Everyone,

Recent days we are witnessing lot of spoof emails coming into our organization. Attackers used to change 'display name' of the sender so that it look like valid email address. But when analyzing the headers it clearly shows its coming form private domains. Is there any way to block this behavior in Exchange 2013?

Thanks in advance
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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
0
Free Tool: IP Lookup
LVL 11
Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

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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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"/>

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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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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
0
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.
0

AntiSpam

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.