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0
votes
1answer
56 views

Postfix body_checks regexp expression does not work?

I have a a reject rule inside body_checks parameter written like this: /(\d{3,4},\d{2} EUR)/ REJECT Body Spam Rule 934 This regexp paramater should be ok, at least according to some testing pages ...
3
votes
2answers
105 views

Postfix - forward rejected by unknown recepients emails to SPAM-learning mailbox

I have Postfix + BitDefender FRAMS running as hygiene gateway before few Exchanges. BD FRAMS can learn it's Baesian filter by download SPAM and HAM emails from dedicated mailboxes. Because we have ...
0
votes
1answer
33 views

Forwarding spam from gmail to email gateway for anti-spam testing

Is it possible to forward all emails that end up in my gmail spam folder to another email address? We're standing up a new anti-spam email gateway and need to generate some real email for testing ...
-2
votes
2answers
52 views

Is there a way to force spam-filter to change their policy or remove them as recognized spam service? [closed]

As per mxtoolbox I got 1 blacklist still active for quite sometime now. UCEPROTECTL1's is running on 7 day policy since last spam mail. This is too strict compared to the 98 other spam filters out ...
2
votes
1answer
54 views

Training a spam filter based on Mailman moderator's actions?

I'm planning a Mailman server, and looking for a good way to enable list moderators train a spam filter (likely to be either spamassassin or dspam). Has anyone come up with a good way to run training ...
0
votes
2answers
105 views

Emails sent per minute and email size, are relevant for spam filters?

I have a server that hosts several websites. Each website has is own newsletter cron. I know that there are more important things (envelope sender, spf record, ecc..) but i would like to know if the ...
0
votes
1answer
24 views

Remove spoofing email notifications

I am using CentOS release 6.5 (Final) with MIMEdefang and I am getting spammed by someone that uses an e-mail spoofer. He sends alot of e-mails from random-user@mydomain to the same ...
0
votes
1answer
96 views

Sieve - Redirect incoming mail for all mailboxes within domain to one specific mailbox

Is it possible to set a global sieve filter to redirect mail to specific mailbox within receiving domain. I understand I can simply point out where I want mail to go in a filter like ...
0
votes
1answer
84 views

Add a per-domain filter in sieve

How can I set up a per-domain filter in sieve/dovecot? In documentation I can see per-user setting: sieve = ~/.dovecot.sieve, and right now I'm using global filter: sieve_before = ...
0
votes
0answers
48 views

How to check why SpamAssasin Bayes filter not working?

I have exim 4.77 with spamassasin 3.4.0 on Debian, I identify spams by myself and send to sa-learn, which seems working. But I have never receive spamscore by Bayes, I check the emails which ...
0
votes
1answer
1k views

GMail sends basic email to spam folder. SPF DKIM ok? [closed]

I am trying to send an email from my server using Mailgun. It's a very basic plain text email but for some reason it is ending up in spam. SPF and DKIM passes. Any ideas? I don't have any clue. This ...
0
votes
1answer
207 views

Installed RBLDNSD for making a custom RBL but something is missing, could you help us?

We have successfully installed RBLDNSD with the idea of having a custom RBL server. Now we have started to make some testing adding some IPs to the our blacklist, and also have configured Exim (Cpanel ...
0
votes
0answers
71 views

How to better block phishing spam due to heartbleed?

I imagine it won't take long for spammers to recognize that Heartbleed is an ideal way to do phishing. I am thinking of ways to mitigate the phishing risk, I mean just this time for the heartbleed ...
0
votes
1answer
966 views

Filter spam emails from being forwarded by exim4

I was studying and searching 2 days about how to configure my exim/spamassassin/clamd configuration. I have the next situation: I have an email a@domain.com redirected to a@gmail.com. Unfortunately, ...
0
votes
1answer
37 views

Evaluation of mail server configuration

I have a mail server configured to use DNS real-time blacklists (DNSRBLs), e.g. zen.spamhaus.org, to determine whether delivered email is spam or not. I would like to evaluate my mail server's ...
0
votes
1answer
143 views

Same email is evaluated as a spam for one user, and regular for the other

I have mail server, with installed spamassassin to filter spam messages. Problem I faced is that at 02h first user received email that is treated as a spam (and is was a real spam, moved to spam ...
3
votes
1answer
437 views

How to edit bad word filter in SpamAssassin?

How can I add several custom "bad" words into SpamAssassin, so emails that contains that words are marked as a spam? UPDATE one of the keys is to edit file /etc/mail/spamassassin, and to add badword ...
1
vote
1answer
96 views

Assistance on why email is being marked as spam [duplicate]

We are trying to send out a mass email for a client of ours through a third party sender and it is always being sent to the spam folder rather than the inbox. I have below the headers from the email. ...
-2
votes
1answer
140 views

Transparent AntiSpam solution in ISP scale [closed]

We have and ISP with adsl , broadband etc subscribers (average 10000 online users with 1M of Bandwidth . average ) . Some users infected by spammer viruses which makes our ip address spaces ...
1
vote
3answers
242 views

How to prevent Linux server from spamming?

I installed mail scanner for spam protection, but is there any script for Linux to notify me or email me that some one spaming on my server ?
0
votes
1answer
179 views

How to Block Web Crawler from Downloading File

Is it possible to block web crawler from downloading files (like zip file) in my server? I supposed to create a PHP script using cookies to track visitors specially web crawlers to login/register ...
1
vote
3answers
304 views

Are generic reverse DNS entries acceptable for an outgoing SMTP server?

Our PTR records are managed by our ISP, as our ranges are too small for them to consider delegating to us. So, every time I want to update an entry, I have to email their support team. In an effort ...
-2
votes
1answer
120 views

Using Spam Assassin as email proxy

I'm looking to setup a Spam Filter Proxy for my clients, not too many mind you, and have it as transparent as possible. I read about SAVASM and Spam Vigilante, and while they are perfect I guess for ...
0
votes
0answers
222 views

Quickly Filtering Blocks of IP Addresses

I had to black list some IPs that were coming from Russia from accessing my site. (Malicious bots kept taking my server down.) I created a text file that I loaded into RAM which contains /8, /16, /32, ...
1
vote
0answers
61 views

How can I prevent my messages from being marked as spam by Gmail? [duplicate]

I'm working on a PHP application. Swift Mailer is used to send messages to clients. Messages are personal (like appointment confirmations with specific dates/times for the receiver), so we're not ...
0
votes
1answer
329 views

Barracuda Spam Filtering vs. other enterprise level solutions [closed]

I am looking for comparison of enterprise level spam filtering solutions in the context of Barracuda Filtering - pros and cons kind of summary. I did hear a lot of negative noise about Barracuda Spam ...
-1
votes
3answers
196 views

Are there spam filters that check email headers?

Are there spam filtering technologies that examine email headers? For example; X-PHP-Origin header can contain an IP address that is on a blacklist; are there spam filters that would catch this? I ...
-3
votes
1answer
100 views

Blocking unsubscribe spam

I have SpamAssassin turned on and using RBL in the WHM control panel using the lists from spamhaus. However, these type of e-mails are getting in. Are there any ways to stop them? Example of the ...
1
vote
2answers
168 views

How Reverse DNS does what it does

Hopefully this is not a stupid question, but I cannot find a clear cut answer. Can someone please inform me exactly what 'source address' is used in Reverse DNS? Does rDNS pull the IP address from ...
3
votes
2answers
12k views

Allow email from a particular sender through spam filter

We are running exchange 2010 and are using the built in anti-spam feature. We have set up Content Filtering, IP Block List Providers, Sender ID, Sender Reputation and it filters out most of the junk ...
0
votes
2answers
169 views

How often do MXLogic lists get updated?

Some domain refused to accept email from my domain due to MXLogic filtering. I've sent an email to falsepositives@mxlogic.com and they responded promptly that they changed their records. Question: ...
2
votes
1answer
2k views

Is there any way to prevent Excel 2007/2010 from including .bin files in saved .xlsx files?

In case anyone isn't aware, the new Office 2007/2010 files are actually a type of archive file. Since deploying some recent (ish) Microsoft updates to our client machines, we've been getting lots of ...
0
votes
2answers
125 views

DNS: MX listing points to google apps and A listing to my own server. Can I send emails from my own server without being classified as spam?

Linux DNS networking question: If an MX record points to IP address 111.111.111.111 and A record of a domain points to 222.222.222.222, can I still send emails from 222.222.222.222 on the behalf of a ...
7
votes
2answers
2k views

GMail suspects confirmation email in stealing personal information

When user registers on my web site, web site sends user email confirmation link. Subject: Please confirm your email address Body:Please open this link in your browser to confirm your email address: ...
0
votes
2answers
162 views

Block by file type, but just file extension using MDaemon

I've had users sending copyrighted files (songs, videos) to each other over email. I blocked the file extensions .mp3 etc. What some users have done is to rename files to .doc etc. I cant block .doc ...
2
votes
2answers
1k views

How do I allow end user 'blocked sender lists' to work even if the server manages spam filtering?

Client filtering in Outlook 2010 is disabled when the server is managing spam filtering. Unfortunately I have a few high profile users that prefer to spam-block mailing lists rather than unsubscribe, ...
5
votes
3answers
4k views

Why does gmail flag my server emails as spam?

I recently moved my server to a new slice at slicehost and since, gmail has been flagging my email as spam. I have added domain keys, created a SPF record, have reverse dns setup, and my ip is not ...
10
votes
1answer
1k views

How to configure amavisd-new for only scanning on particular senders/servers?

I'd like to know how to configure amavisd-new to only scan for Spam on particular clients (IPs, CIDRs or hostnames) or alternatively sender's email domain. I know that it is possible to do it on a ...
4
votes
2answers
1k views

Barracuda tagging email with 'date grossly in the future.'

I have a Barracuda 300. Granted it's running on some old firmware and the Energize updates are quite outdated. I'd like to update them, but, not my financial decision to do so. Starting around the ...
1
vote
2answers
1k views

How can I filter spam from yahoo's servers?

In the last few months my mail server has been getting massive amounts of spam from yahoo.com's mail servers. Each one appears to be from a different Yahoo mail free account. The spam is all coming ...
2
votes
4answers
2k views

Best practices for spam filtering

I've been running an amavisd-new, spamassassin, postfix setup for a while to help crush spam on our incoming e-mail servers. The setup I'm using is a few years old at this point and its about time to ...
2
votes
1answer
131 views

Outgoing emails from China based VPS rejected or marked as spam

I just switched email service provider from Google apps to a VPS with a Hong Kong host. Now I find a huge part of all outgoing emails ending up in spam boxes and in some cases getting totally rejected ...
3
votes
2answers
3k views

Recommended way to implement Postfix 'before-queue' SpamAssassin filtering?

After some discussions with colleagues and the relevant depts. in my office, I have come to the conclusion that for my Postfix server, I must implement a 'before-queue' filtering. The reason is that ...
0
votes
3answers
950 views

My mailserver is getting stuck in http://cbl.abuseat.org/

I have a small system that sends about 15 email/day to my personal email account. I have set up the web form so that the users email is set as sender when I send the email to my inbox so it's easy for ...
3
votes
3answers
152 views

Do mail servers and/or spam filters care about a domain's root A record?

I have a domain which I only use for email adresses. I don't host any content there. My provider added an initial A record at the root of my domain which points to a server that delivers a ...
0
votes
1answer
538 views

Processing items with SpamAssassin and sa-learn

I have been working on getting SpamAssassin up and running for awhile now and am pretty close to being finished. However, there is one last thing that is grinding away at me that I can't seem to ...
3
votes
2answers
2k views

Bayesian filtering for Exchange 2010

So here's the deal. Basically, I am looking for a convenient way to get spam from my Exchange 2010 mail server to my spam filter/proxy (whatever you want to call it) in a mail format for ...
5
votes
2answers
8k views

Optimal parameters set for Postfix “smtpd_recipient_restrictions”

we've inherited the DNS from another ISP and now our mail server is bombed by about 1000 emails per minute, 99.99% of these emails are just spam. We're trying to optimize the filtering/rejecting the ...
2
votes
2answers
175 views

Best techniques to make sure that emails are not marked as spam

We have a service that requires a registration and the registration process sends some confirmation emails. These emails say in a three-line message that you have to click some link with a generated ...
5
votes
2answers
450 views

97% of emails reaching IronPort/Domino are Spam

We have a Domino mail server protected by Iron Port (v7.1.5 I think). Iron Port reports an average 96%-97% of emails are stopped by reputation filtering, and around 3% of emails are clean messages. ...