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-1
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0answers
18 views

new .tech gTLD : risk of email blocking? [duplicate]

I am considering the purchase of a .tech domain for a legit business. However, I am concerned about the risk that anti spam programs will block my mails, just like it is (was?) done with .biz, ...
0
votes
1answer
8 views

sbs 2008 exchange 2007 recipient filtering

We have an SBS 2008 server with exchange 2007 installed on it. We run a spamfilter in front of it. My problem is that whenever I use an invalid email address. invalid@mydomain.com it gets accepted by ...
1
vote
1answer
54 views

SpamAssassin with dovecot-antispam training

I'm trying to get dovecot-antispam working with SpamAssassin' sa-learn. This is my Dovecot configuration: antispam_backend = pipe antispam_trash = trash;Trash;Deleted Items; Deleted Messages ...
2
votes
1answer
34 views

Can IP reputation be affected due to automatic forwarding?

I am hitting a dead wall with the support team of my email hosting provider. The IP they assigned me was blacklisted and so sending emails to AOL.co.uk end up getting rejected. After several emails ...
1
vote
1answer
40 views

How to tell if razor is running?

I have a mailserver which is using amavis to do the spam testing (through spamassassin). Now I wanted to use razor and pyzor as well. I installed them and did the following: # su - amavis -s ...
2
votes
1answer
69 views

Exchange 2013 IPBlockListProvider blocking some (but not all) matched IPs

I have configured our Exchange 2013 Edge Transport server to utilize several IPBlockListProviders including Spamhaus. While they work great most of the time, there are still some emails which despite ...
0
votes
0answers
39 views

Lotus Domino how to Enable Verify connecting hostname in DNS but with exception

Hi I enabled @ LOtus Domino the Configuration -> Message Settings -> SMTP Inbound Controls Verify connecting hostname in DNS This blocks all messages incoming if the sender IP has no reverse dns. ...
1
vote
1answer
39 views

relearn bayes autolearned spam when mails already processed by exchange

I'm using postfix with amavis and spamassassin to filter out spam before relaying everything to an exchange server. Regularly I got mails which weren't catched by spamassassin, even worse, they were ...
-1
votes
1answer
135 views

My server mail going junk in hotmail and yahoo [duplicate]

All my server mails going to spam in hotmail and yahoo. Here is my full mail source. Can any one please help me to sort out this issue ? ...
2
votes
1answer
133 views

Postfix Limit mail for domain from IP range

I have multiple domains and email accounts on my postfix server. All of them get slammed with spam despite all my attempts to get it under control, I broke down and started paying for a pass external ...
0
votes
1answer
91 views

Exchange 2007 ignores whitelist (BypassedSenderDomains) when IP is found on a block list

On my Exchange 2007 machine I configured the IP block list provider to query zen.spamhaus.org bl.spamcop.net dnsbl.sorbs.net some of our business contacts or on those lists and get blocked by ...
1
vote
1answer
161 views

postfix header_checks - regex spanning multiple lines

I would like to create a spam filter that spans multiple lines in headers. This is my /etc/postfix/header_checks file: /^From:.*name[0-9]+@.+[\r\n]+To:.*name@domain\.com/ REJECT It's a valid ...
1
vote
1answer
122 views

Postfix: How to make complex attachment filtering?

I have Postfix on our server. I need to filter attachments in incoming mail not only by it type, but also check what inside of it. Exactly by now I need to filter attachment that: is a .zip archive ...
0
votes
1answer
93 views

How filter catchall email account based on recipient address [closed]

// Background info I am building a chrome plugin that forwards private messages from websites to your email and allows your email replies to be returned through the various sites private message ...
0
votes
0answers
30 views

SCL not available for single user

Recently migrated from Exchange 2003 to Exchange 2010 with Edge server. Problem is: All incoming mail for one specific user bypassing Mail Content Agent checks, there is a record from logs: ...
0
votes
1answer
505 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
339 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
68 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
67 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
72 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
215 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 ...
1
vote
1answer
34 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
143 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
165 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
1answer
2k 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
348 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
76 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 ...
1
vote
1answer
2k 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
43 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
237 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 ...
4
votes
1answer
796 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
128 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
195 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
433 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
295 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
500 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 ...
-1
votes
1answer
163 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
380 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
64 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
543 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
284 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
110 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
194 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
18k 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
189 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 ...
1
vote
2answers
139 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
3k 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
246 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
2k 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, ...