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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 use Exchange 2010 and have VIPRE Spam app that is supposed to move spam to a new folder designated 'SPAM'. It is identifying it as spam but not creating the SPAM folder or moving messages to said spam folder. Support with the company says its because Autodiscover is not working properly.

Their initial response is to fix any errors under test-outlookWebServices before they can offer further assistance. I have 0 issues with OWA and have 0 issues with mobile devices. 0 issues with Desktop Outlook clients yet they tell me that I must correct the error listed in the detail before they can assist. So I am looking to resolve the error, that isn't causing any problems, without creating new ones.

The error is   The certificate for the URL https://SERVER.DOMAIN.local/autodiscover/autodiscover.xml is incorrect
 . For SSL to work, the certificate needs to have a subject of SERVER.DOMAIN.local, instead the subject found is DOMAIN.com. Consider correcting service discovery, or installing a correct SSL certificate.

Obviously I cant get an alt for .local so I am trying to identify in my configuration where the system is referencing the .local domain.

internalURI is currently https://SERVER.DOMAIN.com/autodiscover/autodiscover.xml
internal URL is currently https://SERVER.DOMAIN.com/ews/exchange.asmx
externalURL is currently https://SERVER.DOMAIN.com/ews/exchange.asmx

I suppose it could be an IIS/Cert issue and not just an exchange config issue. Just looking for more …
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A Windows Server 2008 R2 installation has been infected with a Trojan horse that has encrypted files with the *.rapid extension.  The server had Avast for Business installed.  An AVG rescue CD was made and ran multiple times to eliminate instances of the Trojan horse.  After four times, the server is labeled clean from the AVG rescue CD.  I then uploaded two *.rapid files to nomoreransom.org and it came back saying that there was no fix for this.  Does anybody know of a trusted decryption software that can correct this problem?  I can attach a file if requested.
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Dears

I have a problem on my mDaemon mail server
I have 1 user that is receiving hundreds of mail delivery error as if he is trying to send emails to someone but failed...
The emails are to a weird email 24484763@att.txt

Looking at mDaemon logs I see that it is as if the user is really sending those emails while he is not.

Those ar the actions I took
I formatted his pc and reinstalled outlook
On mDaemon I changed the password of that user and created a complex password (10 char complex).
It worked for few hours then it is coming again...!!

My ISP is threatening to block me as he is saying thousands of emails are being sent as spams...

How to resolve this issue? What shall I do ?
BTW relay is not activated on my mDaemon server.
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Dears,

I have been warned from my ISP that they have blocked my IPs because a lot of spamming is coming from my network.

How Can I check this ? I have a network of 50 Computers. I also have a firewall (Cyberoam).

Please advise.
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I'm successfully using a Barracuda spam filter in conjunction with our 2010 Exchange server.  Our MX record and our rDNS record point to mail.domain.com, which is also the Hello response from our Exchange server.  Now that the Barracuda is in line and working, it is responding with a Hello of Barracuda.domain.com.  I've added an A record for the Barracuda response, and MX Toolbox passes everything, but I'm concerned that eventually they will get black listed because the MX record and rDNS don't match the Hello banner.

I'm considering changed the MX record, and the matching rDNS record, to Barracuda.domain.com.  But this has been up and running for a while and I don't want to create an issue where one doesn't exist.

Thoughts please??  Thanks!!
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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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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,

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, 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"/>

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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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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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.