Check if Email Address is Blacklisted

Cyber Security Degrees

How do I check if my email is blacklisted?

Email Blacklist Check – A blacklist is a list that includes IP addresses, sending domains, and URLs. It also lists users who are denied access to your computer. This happens because they may be suspected of sending unsolicited bulk emails or contain malicious code that could harm. Email blacklists checks are used to reject and isolate spam messages from suspected IP addresses or domains.

Who makes blacklists?

Many ISPs such as Comcast and Verizon USA, along with email services like Yahoo or Gmail, maintain their own blacklists. Independent organizations (sometimes anti-spam vendors, in other cases non-profit groups) also create blacklists. These lists contain a list that includes IP addresses and emails that have been identified sending spam. These blacklists can then be used by ISPs and any other organization that has its own mail servers. Blacklists can be implemented as real-time databases which determine whether mail sent from an IP address is spam based on pre-set criteria.

There are many blacklists available. Each has a different way of determining whether an inbound email is a spam. Blacklist developers often use spam complaints, spam traps, and other proprietary data to add a source of information to a blacklist.

Can I be removed from a blacklist?

A blocked domain or IP address can block your mail. You may be able to request delisting. You will need to give details about your email program (IP addresses, sending domains, and date of occurrence) to submit an unblock request.

I am not a spammer! What can I do to prevent my email address from being blacklisted?

Here are some ways to keep your legitimate emails safe from being blacklisted

  • Do not buy email lists. These recipients are likely to mark unwanted emails as spam and report them to their ISP or spam filter to be added to their blacklist. A spam trap is an email address that is specifically designed to catch spam and is likely to be included on the list.
  • Each email you send must contain unique content. You should not send the same content repeatedly (e.g., tens of thousands or hundreds of millions of times).
  • Double opt-in is a way to approve subscribers to your email list. This ensures that subscribers sign up with valid email addresses.
  • Spam detectors don’t like to see too many exclamation marks (!) Many words that convey hype such as “guaranteed”, “win,” or “free” Spam messages that contain offensive words and off-color topics will often be flagged automatically as spam.
  • Sending an email with one large image is not a good idea. These are common indicators that spam filters may be looking for.
  • Use all capital letters in your subject and message.
  • Double opt-in is a way to approve subscribers to your email list. This ensures that subscribers sign up with valid email addresses.
  • Use reliable security software to secure your email server against cyberattacks.

My email isn’t spammy so why is my domain listed on a blacklist

Even if you follow these best practices to prevent your email from being flagged spam, your IP address or your domain may be on a blacklist.

This is because malicious actors could hack your computer, network, or website and send you emails without you even knowing it.

Hackers often compromise legitimate websites in large numbers. The stolen resources can be used to launch attacks against larger domains. The website’s email generator can be one of the resources that are attacked. An attacker can upload malicious files to targeted websites. These files can be used to send spam emails from the domain of the website, sending thousands or more of them. These emails could contain explicit content, redirect traffic to other websites or spread malware even more. These large numbers of emails, along with other characteristics that might indicate they may be malicious, can trigger antivirus vendors (such Norton, McAfee, and Sophos) to blacklist the site.

Yikes! How can I stop cyberattacks that could lead to blacklisting?

You can take more steps than just following email-sending protocols to prevent, fix or repair blacklisting. A website security solution such as Comodo cWatch Web can be your weapon against hackers trying to send malicious emails from your website’s domain.

Comodo cWatch Web is a fully-featured, managed, cloud-based security solution that can protect your website from hackers who could infiltrate your systems. It comes with a powerful web application firewall (WAF), which can protect your website from advanced threats like Cross-Site Scripting, Denial-of-Service (DDoS), and SQL Injection attacks.

The WAF is provisioned via a secure Content Delivery Network, (CDN), and monitored by the Comodo security event management (SIEM). Web traffic is continuously monitored and alerts are immediately received by security experts at the always-on (24/7/365) Comodo Cyber Security Operations Center (CSOC). Certified analysts immediately respond to any alerts and deploy countermeasures against the web application firewall to address security issues before they escalate into security incidents.

Email Blacklist

These powerful features are part of Comodo cWatch Web to guard against hacking that could lead to blacklisting.

  • Web application firewall (WAF). The web application firewall provides powerful, real-time, advanced malware protection for websites and web applications, as well as intrusion and filtering protection. This firewall prevents spammers and other malicious actors from stealing your website.
  • Information and Event Management (SIEM), Security Information, and SIEM are the heart of the Comodo Web cybersecurity stack. It provides real-time security monitoring and advanced threat detection as well as incident management and forensics with data from over 85M+ domains and 100M+ endpoints.
  • Cyber Security Operations Center (CSOC). An expert team of certified cybersecurity professionals is available 24/7/365 to provide surveillance and remediation services.

Comodo cWatch Web is also able to enhance your site in other ways.

  • A secure and fast content delivery network (CDN), can help you achieve better SEO results. Comodo CDN provides web content faster than ever with built-in security. It caches at multiple global data center servers to speed up traffic spikes and reduce the distance to local servers. This will increase your website’s visibility in search engines (SEO) as well as ranking.

For best results, use the cWatch Email Check Tool

  • PCI scanning is required if your website serves as a payment portal.