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Blacklist Lookup allows you to check if a domain or IP address is included in spam, suspicious behaviour or security threat blacklists. These are checks that website owners, email admins, developers, and SEO professionals employ when having trouble with emails that have been rejected, are flagged for reputation, or are experiencing delivery issues. A listing is highly relevant but cannot be considered as proof of a malicious website. The first thing that needs to be known when trying to react from a problem is which list reported the problem.
The blacklist lookup verifies that a domain/IP falls into (or not) one (or multiple) blacklists maintained by reputation and security providers.
These databases can include systems that are known to be involved with spam, hacked servers, phishing, malware or any other complaints.
The various types of lists have various uses. An email blocklist isn't necessarily a website malware database.
Finally, using the name Blacklist Lookup, is how Free SEO Pro's tool is supposed to be used. The inputs, databases and results currently available with it are yet to be confirmed.
A domain black list is a list of a domain name or a host name on which it is located that is affiliated with a certain activity.
An IP blacklist is a list of a network address (usually due to email sending behaviour or suspected abuse).
These differences are important because the servers used for your Web site and email service may be different.
A website can still provide services as the outgoing mail server might be putting limits on the amount of mail it can deliver.
Most blacklist services use one of two methods: match a provided identifier against a reputation list of bad guys or use a reputation list of good guys to filter out the bad guys being provided.
DNS based query is supported by some email blocklists and sites or APIs for checking email reputation are provided by some security services.
The information is provided for each provider to decide on how to collect, evaluate, list and remove.
The result of a lookup is then valid only for the database being looked into.
DNSBLs are often called “DNS based blocklists”, and they enable participating systems to query for reputation data via DNS.
Mail servers can use these services to help determine if or not to accept incoming connections.
But — as with most things on the internet — a variety of signals are added together — authentication, sending patterns, mail provider filtering rules, etc.
Not all receiving mail servers will block messages from you just because of a DNSBL listing.
Some databases are specific to phishing sites, malicious downloads, compromised infrastructure or suspicious URLs.
Some focus on junk e-mail.
It's crucial to differentiate between a security alert and a listing on an email reputation server before selecting a solution.
The organization that's keeping the list can often offer a more relevant description of how its list is created.
The following is a typical blacklist investigation procedure: The exact interface of Free SEO Pro couldn't be verified.
Go to the Blacklist Lookup page.
Find out which domain or public IP address you wish to research.
Find the lookup input (which is available).
Type in the identifier in its valid format.
Write out the results of the check.
Check the status on return of items.
List blacklist providers, if applicable.
Identify if result relates to a domain or IP address.
Access the official documentation of the provider concerned.
So find out the source of the matter and correct it before asking for its removal.
Don't expect that all available reputation databases are being checked.
If an address is not accepted, check the correct syntax of the address and check with the interface for support of IP addresses or domains.
If there is an issue and email isn't being delivered, try examining the public IP address for your outgoing mail server.
This address may be different from your hosting IP for your Web site.
You can get a list of the appropriate sending infrastructure from your email service provider (ESP) dashboard or email delivery logs.
If the website is a suspicious warning, check the domain and/or URL of the site using the security service of your choice.
You're a business that sends out legitimate appointment reminders but randomly starts getting email delivery failures.
Your mail administrator reviews the sending server and determines that it is a public address.
In this example, do not enter the real mail server address, but use the reserved “documentation address” 192.0.2.45.
These are possible findings from a hypothetical reputation report:
Check Illustrative result
Email blocklist A Listed
No Blocklist B Not listed
Database of threats on websites Not checked
These are not the actual lookups to the statuses – they are made up statuses invented for the purpose of this demonstration.
The first listing indicates that you should check out that provider's explanation.
The 2nd result will not cancel the first as the criteria is different in each database.
There was no evidence either way from the unchecked database.
Then look at traffic logs sent by others, authentication parameters, hacked accounts and unusual traffic.
Once any questionable faults have been eliminated, complete the removal process as the listing provider has outlined in their procedure.
Listed results indicate that the checked identifier will be found in a specific database based on the information it returns.
Not always definitive of the reasons for the listing or if the issue is still ongoing.
Check the provider's official documentation for information.
A clean result is defined as a result not listed by one or more databases that were successfully checked.
Not that it is indicative of a safe website, that e-mail will get into anyone's inbox, or that there are no warnings in other databases.
If the query failed, the call returned unsupported input or the query timed out, or no provider for the call exists, the status remains unknown.
Remember that a security check (in the form of not finding something you are looking for) does not necessarily indicate success!
Retest with the provider official look up service as needed.
When messages are rejected or delayed, or repeatedly scored as spam, check reputation information.
Don't assume that the delivery error is due to a blacklist—read it first.
There may be a point of interest in checking your website for changes that you didn't make, suspicious redirects, illegal files or other malware, if you receive a reputation warning from someone.
Take advantage of specific security scanners and use hosting records for additional investigation.
If the email address and/or the website were hacked, research appropriate reputation services once the hacked systems have been secured.
Reach to remove listing without fix to cause may result in re-listing.
If organisations are running their own mail servers, checks can be made from time to time to give the organisation some further context.
Monitoring authentication, server health, abuse reports is important too, though.
Checking the IP of a website is one incorrect move when the issue is with a separate e-mail server.
One example is that all of the addresses listed are deemed to be all part of a malicious site.
Sometimes, shared infrastructure can simplify the reputation investigation process and listings may be outdated.
If you find conflicting results, evaluate each provider individually.
If there does not match the look up, check the input and attempt to use an official provider checker.
Avoid any unknown company offering a promise to take you off the blacklist.
No one search solution guarantees to include all reputation databases or to be an accurate judge of all email filtering decisions.
The lists may change in time, depending on provider. There are some that offer public explanations and some which restrict access.
The blacklist status itself is not an indicator of Google ranking and also does not indicate if a domain is indexed.
Looking details of where the info in the tool comes from, its accuracy, how many results can be seen, its registration means, its costs, and its privacy policy need to be verified.
Explore the public address of a website with Domain into IP tool.
You can determine any noticeable hosting infrastructure with a Domain Hosting Checker.
When using a Find DNS Records tool, it is possible to learn more about mail routing and domain configuration.
You could try using a ‘Google Malware Checker' to look into issues about website safety, but the databases and coverage have to be verified.
When emailing a reputation researcher, please refer to the Spamhaus Resources and Official Listing guidance. Google Safe Browsing offers a further investigation technique for suspicious sites, via the site status checker.
Blacklist Lookup queries the selected list of reputation databases to see if a domain or IP address is blacklisted. The results are based on the sources consulted and must be evaluated separately.
Use a domain compatible look up service and input your domain. Check any reported listings, get the provider's name and verify with official records before determining what action, if any to take.
There are numerous reputation services that have the ability to do public IP address checking. Verify the tool that you have chosen can take IP addresses and research the IP address that pertains to the reported problem.
This may be because you sent something you didn't mean to send, your account was compromised, there was unusual traffic or because of provider specific policies. Review mail logs and the description of the listing prior to attributing a cause.
Not necessarily. An email blocklist can not only apply to the content of a site, but to sending behavior as well. Security threat databases identify various threats and all have to be investigated separately.
Yes. Mail Fetchers can utilize a reputation database when filtering them. But delivery is also affected by authentication, the history of messages sent, recipient policies, and message content.
Know the provider of product/service, determine the issue, and take corrective actions following provider guidelines for removal. Some listings are active for a limited period of time, others need a review or action.
There's no set time for how long it should last. Elimination is subject to the provider's policies, the cause of being listed, and if there has been a correction of the underlying condition.
When there's shared infrastructure involved, it can muddy up the waters for reputation management purposes. But whether or not other customers' act will impact your services will depend on real IP addresses, mail systems and provider policies.
Email blocklist is not a Google ranking penalty. But there are other issues related to users and visibility if there are some real security issues with the website or pages are down.
Average/Equal means that no listing was reported by databases that have been successfully checked. It does not guarantee complete security or successful email delivery, or removal from all other reputation lists.
They can ask various data bases or follow various updating cycles or process uncollected answers differently. Compare provider names and official records themselves, rather than one summary.
Public reputation services can typically look up either publicly recognized domains or IP addresses. The terms of access and uses will vary among providers.
Yes. Email delivery issues can be caused by an incorrect MX, SPF, DKIM or DMARC configuration. These issues should be investigated outside of the blacklist status.
Verify with its provider, look through the logs and security settings, address any issues listing has confidently, and go with the proper steps for withdrawal when necessary.
