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

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-2
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0answers
17 views

Good or bad idea to white list others IP address? [on hold]

When some one try to send an email, spam-filter will not allow their mails to reach to the server, their mails bounce back. Then they ask "hello, please white-list our IP address". I said, "let the ...
0
votes
1answer
27 views

Postfix Localhost Server Sending Spam to Itself

I have an iRedMail server that runs Postfix and am trying to determine the source of its spam problem. I have since changed the MX records on the domain for the address receiving spam and the good ...
1
vote
2answers
181 views

How to whitelist an ip range blacklisted by Spamcop

Our testing team uses email addresses from a domain which is different from the actual site domain. For example, our site is www.abc.com and email addresses are belongs to user_x@xyz.com. www.abc.com ...
3
votes
0answers
46 views

Postfix reject_rbl_client Blacklists Not Working

I have a mail server (iRedMail) that uses Postfix. I've been getting a lot of spam, so I modified the /etc/postfix/main.cf file and have the smtpd_recipient_restrictions set to this: ...
0
votes
0answers
5 views

Tool for checking and bluk deleting form domain black lists

My domain name is http://krakow-auschwitz.com/ I have already try to change my server settings according to best practises found at ServerFault (delegate it to my hosting administrator). So I'm ...
0
votes
1answer
25 views

Exim server and blacklist for too much login attemps

This is the today exim reject log: 2016-01-07 13:48:44 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data (set_id=info@mydomain.com) 2016-01-07 15:32:09 login ...
1
vote
2answers
38 views

How do IPs end up on the spam blacklists

I don't know if this is the right place to ask this kind of question but here goes. I have 3 IPs on my server, which I'm running for shared hosting. The main shared IP gets blacklisted sometimes, ...
0
votes
0answers
16 views

Blacklist server [duplicate]

I have a problem with one blacklist server: Subject: Undelivered Mail Returned to Sender This is the mail system at host xx.xxxxx.sk. I'm sorry to have to inform you that your message ...
1
vote
1answer
21 views

Email forwarding issue

I have a website at classicalmusiccity.com. We have emails tied to that domain that forward to a gmail account. Everything has been fine and dandy until a couple days ago. No one can send an email to ...
2
votes
4answers
249 views

False IP blacklisting on CBL and Spamhaus ZEN

I've gone thru this: Spamhaus XBL keeps adding my IP I'm managing the server 23.239.30.81 on Ubuntu using Postfix. Since last 6 months or so I started forwarding all my: Cron Daemon logs ...
0
votes
1answer
69 views

Determining e-mail server blacklisting from log files

I have my self-hosted e-mail server. There is no current problem of being blacklisted but I want to be proactive about it and I want to start with the log files. There have been some entries in my ...
1
vote
1answer
107 views

Microsoft Exchange 2013 and Open Relay Prevention

I have set up a Exchange 2013 server on my Windows Domain network to receive and send mail both internally and externally. After a rejection by Google to receive email from my server (the reason was ...
1
vote
1answer
120 views

how to specify a partial domain in blacklist with SpamAssassin

is there a way to specify a partial domain in the spamassassin blacklist? I get spam from something like abc@something1.something2.xyz but I also get junk from abc@something3.xyz. if I specify @.xyz ...
1
vote
1answer
133 views

How Does DNSWL work? How can I gain better trust? [closed]

How does DNSWL work? It's clear to me when someone report a spam, but how can I gain a higher score/trust? Do some companies report "good" servers? Or will the score go up with time without reporting ...
0
votes
0answers
64 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
votes
1answer
70 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 # ...
0
votes
1answer
197 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
votes
1answer
84 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
1answer
418 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
votes
0answers
34 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
127 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
votes
1answer
354 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
vote
1answer
100 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
votes
0answers
13 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 ...
-4
votes
7answers
6k 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
40 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
102 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 ...
19
votes
4answers
2k 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
260 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
354 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
votes
2answers
281 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
vote
2answers
54 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
203 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
167 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 ...
1
vote
1answer
645 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
244 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
877 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
47 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
113 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
500 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
3k 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
74 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
53 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
136 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
93 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
votes
1answer
25 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
639 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
votes
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
63 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
896 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 ...