A blacklist is a basic access control mechanism that rejects elements included in the list.

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27 views

Mail server still BLACKLISTED after fix the issue

I have an Exchange 2007. CBL has blacklisted me because: This IP address is HELO'ing as "localhost.localdomain". If you test and helos properly means something OTHER than your mail server ...
0
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0answers
11 views

Exim Blacklist -> *domain doesn't work

I have a manual filter in the exim. It was done this way: In section: "CONFIG". I put: domainlist exim_blacklist lsearch;/etc/eximblacklist In Section: "PREROUTERS". I put: driver = redirect # ...
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1answer
48 views

Google Apps with internally/customer hosted SMTP relay - (not using smtp-relay.gmail.com service)

We are using Google Apps for our email service, and send a bulk of around 15k emails a day from our internal relay server (its outbound only, no open-relay) to customers. Recently, we ended up ...
0
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1answer
41 views

Unable to resolve IP Blacklisting with Spamhaus

I have a website which is currently assigned an IP 64.XXX etc from my hosting provider. This IP when looked up comes up clean with all Blacklist checks that I run. However, I am also being assigned an ...
4
votes
0answers
111 views

How to blacklist or whitelist lots or few ip ranges with ipset and iptables + fail2ban

EDIT: It's astonishing how the urge to find a solution sometimes is sufficient to slowly but steadily lead one towards a solution. Also, the more often I reread my question in order to clarify it, I ...
0
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0answers
19 views

Prevent Exchange blacklisted with 2nd IP?

" As a side note. You could put a server on 2nd IP and have your main gateway different ip. This will prevent your server from getting blacklisted occasionally since only legitimate emails will come ...
-7
votes
2answers
57 views

How to add an email to an international Spam Blacklist [closed]

I am sick and tired of getting invitation emails from LinkedIn. When I ask the senders to stop sending these to me, the answer is always the same: they never sent the email in the first place. This ...
0
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1answer
88 views

Exim: silently drop messages to given recipients?

I have an old legacy php application that used to send out a log of debug mails on each aspect of its work. Due to fact that noone care to turn off this feature and also dut to fact that one day we ...
1
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1answer
47 views

If I create a virtual email alias that forwards a lot of spam email, is my IP at risk of blacklisting or the originating IP address? [duplicate]

A scenario of this would be something like a domain called domain.com has a mailserver set up that forwards all email sent to info@domain.com to person@gmail.com. If someone sends a lot of spam to ...
0
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0answers
12 views

Blacklist mail server [duplicate]

I have checked my IP in all spam lookup sites. those sites are DNSBL.info, spamhaus.org, barracudacentral.org, spamcop.net, blacklistalert.org and all of it says that I am clear. But when I checked it ...
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4answers
2k views

Remove blacklist from spamRATS

I have checked my IP in SpamRATS and the result is the following: Standards Compliance: Does IP Address resolve to a reverse hostname... Passed! Does IP Address comply with reverse hostname ...
-4
votes
1answer
38 views

Preventing operating systems from being installed on a server [closed]

Is it possible to blacklist certain operating systems from being installed on a server? Example scenarios: 1) There is an existing physical server, with no operating system. Is there a way to block ...
1
vote
1answer
62 views

Postfix SMTP recipient filter not filtering

I have setup Postfix with a list of blacklisted recipients, so that the Postfix server should not relay mail to them (smtpd_recipient_access parameter in main.cf). The addresses are properly listed ...
-10
votes
3answers
1k views

make fail2ban use public blacklists [closed]

I've been searching high and low for a way to connect fail2ban with blocklist.de (or any other public blacklists, for that matter, as long as fail2ban can report to it). Pretty much every result that ...
19
votes
3answers
1k views

What are the best methods for catching snowshoe spam?

I'm using Smartermail for my small mailserver. We've been having a problem lately of getting waves of snowshoe spam that follow the same pattern. They come in batches of 3 or 4 at a time. The ...
1
vote
1answer
168 views

postfix disable blacklist checking for registered user

Many users has dynamic IP and sufficient number of these IP is blacklisted. How to disable check Postfix blacklist only for registered user? I want only block incoming mail from blacklisted IPS only. ...
0
votes
1answer
235 views

How do I stop SPAM from being sent from my server? [duplicate]

I have a VPS which I rent and it is running Centos 6. The VPS has ZPanel installed which is used to host some websites and emails. One of my clients has noticed thousands of 'undeliverable' messages ...
0
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2answers
206 views

Exim - block incoming mail from blacklisted IPS only

I would like to check for blacklists only for incoming e-mail. I have users who usually get dynamic IP's which are blacklisted so they are not able to send the e-mail if I turn the blacklist option ...
1
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2answers
44 views

Will a mail relay be blacklisted if it accepts a mail relay request then later sends NDR?

Got a question about blacklisting behaviour. Internet MX records for "mydomain.com" point to my anti-spam gateways. The anti-spam gateways then relay the email to my mail server. If someone sends an ...
0
votes
1answer
103 views

Detect IP blocking or blacklisting

Unable to access a cloud server (Windows) from a particular public IP provided by the ISP. Tried to PING, tracert, telnet everything, nothing worked. No deny rule mentioned in the firewall. Properly ...
0
votes
1answer
134 views

What are my options for sending email from my VPS with a Blacklisted IP [duplicate]

I have postfix and dovecot running on debian 7, I can send mail fine, but it keeps going to my spam folder when sent to google accounts. Another user who doesn't use gmail said it was delivered to his ...
0
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0answers
223 views

How do I remove a blacklisted IP from RealVNC server?

From my Windows Event Viewer I see that an IP is blacklisted, when trying to connect I get Connections: rejecting blacklisted connection: 192.168.1.89 Where is the blacklist maintained so I can ...
0
votes
1answer
487 views

Two servers, severals domains, reverse DNS and blacklist

I will try to explain the context. 2 VPS with PLESK 11.5 The first (named vps67877.ovh.net - we call it v67) is a mail server (ip 37.187.33.38) The second (named vps68789.ovh.net - we call it v68) ...
-1
votes
1answer
177 views

Blacklist and whitelist of domains on Debian Linux router

I have to create blacklist and whitelist in small office for two groups of employees. I divided the users into two group: First group has block all webpages except about 80 domains which i want to ...
12
votes
3answers
869 views

How to remove ourselves from nudity blacklists? [duplicate]

We recently bought our domain. It turns out, two generations ago, it was a porn site. Now we're still blocked in some filters, resulting in blocked pages at several corporate routers. I'm now ...
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
2answers
86 views

Can I get postfix to drop all mail meant for a specific MX?

TL;DR: can I DISCARD outgoing mail to a specific server by DNS name of the MX record , or failing that, by its IP? We've some 'trouble' (well, more of an annoyance really), of people filling out some ...
0
votes
1answer
347 views

Azure IP Blacklisted

Am hosted on Windows Azure and the IP provided as the A record is blacklisted in several spam alert groups. This is because of some other URL's that seem to share the same IP and is affected with ...
0
votes
1answer
2k views

Weird CBL blacklisting (cutwail spambot ?!)

I have a weird problem and I wonder if anyone can help me as I really don't know what else to do. I'm administering a Linux server (Fedora 17), for a SMB company (~100 LAN computers). This server ...
0
votes
1answer
70 views

Blocking an IP that is constantly accessing our website

Yesterday I noticed in our apache logs that there is someone constantly accessing our website, sometimes 5 times a second or so, and sometimes once in 5 seconds. However, it's happening 24 hours a ...
2
votes
2answers
52 views

Are only IP-Addresses Blacklisted or also Domains?

Unfortunately one of the forms of my website was used to send completely sensless spammails. As I found out through "http://mxtoolbox.com" that my IP-address is listed on two blacklists, I want to set ...
2
votes
1answer
103 views

Postfix thinks IP is in blacklist, but is not actually listed in blacklist

Got a bit of a weird problem here with Postfix. Been getting a whole bunch of notices where fail2ban has banned 69.164.196.21 (ryujin.darkdna.net) for failures against Postfix. Here is a relevant ...
3
votes
2answers
88 views

SMTP: Which IP should I monitor?

I use a relay server to deliver external mails. I use relay server's IP in SPF record. But I'm not sure about blacklist monitoring/checking. Should I check main server's IP or relay's IP?
0
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1answer
22 views

Logging redirects and rewrites

I'm using the following blacklist .htaccess directives in apache v2.2 (on mediatemple): http://perishablepress.com/5g-blacklist-2013/ I want to get a sense of how often these directives are ...
2
votes
1answer
425 views

Postfix: Resend 'hard' bounces

I had a number of messages get rejected by the recipient's mail server with a status 550 code due to an IP address blacklist. I've sorted the problem that caused the host to become blacklisted, and ...
0
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0answers
45 views

Information to keep in a spam black/whitelist

Assuming that I want to black/whitelist specific messages as spam/not spam, what message/sender info should I collect in that blocklist? The address will be most likely faked so I assume the 2 ...
0
votes
1answer
55 views

Access to Google's blacklists for my firewall

I know that certain google products automatically access Google's blacklist database. Can I do the same? Is there maybe a cleaned-up dns server against which I could verify my own dns queries? Or some ...
-1
votes
1answer
737 views

Microsoft , Hotmail , Live , MSN, Outlook , unable to send emails and no support received from microsoft in 3 months we are trying asking for that [closed]

Ok this is somenthing unbelievable, we have a website, users sign up and receives links to confirm they signed up BUT: 1 - microsoft blocked our IP (no one with microsoft email account can receive ...
0
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1answer
82 views

Steps to make sure network is not blacklisted…Again

I have an interesting issue. I have a client that just got blacklisted due to spam being sent out over the last 2 days. I have my firewall configured to only allow mail to go outbound on port 25 ...
0
votes
1answer
378 views

False positive rate of CBL

We've come into the office (30+ networked systems) this morning to find that our email server is blacklisted on the CBL for: This IP address is infected with, or is NATting for a machine infected ...
0
votes
1answer
129 views

Should I put SPF checks before or after RBL checks in Postfix SMTP server?

I am setting up a Postfix SMTP server (pre v2.10) and was thinking to put the smtpd_recipient_restrictions as follows. smtpd_recipient_restrictions= permit_mynetworks, ...
1
vote
2answers
396 views

Mac server infected with spam agent

We have a huge trouble :( .. Our mac server makes a spam delivery. Our IP already blacklisted in about a dozen of servers (checked with http://mxtoolbox.com/). We have another computers in the same ...
0
votes
0answers
39 views

On multiple spamming-blacklists after desinfecting network computers

We are currently listed on a couple of spam-blacklists since last week. I have taken the following approach to prevent this from reoccurring: scan every (windows)-device in the building using ...
0
votes
0answers
107 views

Exchange 2010 being blacklisted

Let me start with thanking everyone for trying to help. First, let me fill everyone to the environment we are running. We are using Exchange 2010 in virtual Windows 2008 R2 (VMWare 4.5). We are ...
0
votes
2answers
924 views

Gmail is blocking our email, and the IP address listed in the returned email is not our main mail address

Our mx records point to a different IP address than our main public address. However the mail being sent, SMTP is pointing to our main public IP address. The email using the address that SMTP is using ...
1
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3answers
732 views

IPTables add an IP to IPSet list

How to correctly add an IP address to ipset from an iptables rule? Or isn't that possible at all? This rule doesn't work for me: -A INPUT -m recent --name IP_LIST --set Type of IP_LIST is hash:net ...
0
votes
1answer
181 views

I cannot access my websites but everyone else can [closed]

About 4 days ago I could no longer view my websites from my IP address. I can see it through proxies and other IPs, everyone else sees it fine. I've contacted my host, they say I'm whitelisted and ...
0
votes
1answer
154 views

Global Authority for Blacklisting IPs

I know that there are few common ways to block attacking IPs (such as deny in htaccess). Additional to that, we could get a huge list of IPs to block from misc sites such as : ...
0
votes
1answer
2k views

banning all *azenv.php request to my server

I am using apache 2.2 under centos6, and I'm recently having some kind of accesses that are unwanted, and that I wish to ban. For instance, I have this in my error_log: [Sun Apr 14 01:06:29 2013] ...
1
vote
2answers
2k views

Black Hole DNS on Windows DNS Server

I am looking at configuring our Windows DNS Servers for some type of DNS based blackhole operation. Ideally, we would be able to use feeds from MalwareDomains.com or the like. I was curious how one ...