How To Check Domain Reputation: Tools And Tips

Key Takeaways

Domain reputation, often scored like a credit score (0-100), critically impacts email deliverability and campaign success.
Regularly check your domain reputation using tools and monitor blocklist status to act quickly on issues.
Implementing email authentication (SPF, DKIM, DMARC) is fundamental for proving legitimacy and boosting reputation.
Maintain high recipient engagement through relevant content and keep email lists clean and verified to reduce spam signals.
Consistency in sending volume, schedule, and content quality, along with avoiding risky practices like link shorteners, builds long-term domain trustworthiness.

Your domain reputation/IP reputation can make or break your email performance. Organizations, particularly those that depend on email for digital marketing and communications, including activities like cold email outreach, sales outreach, link building, or securing podcast appearances, must maintain a strong domain reputation at all times. Poor domain reputation often leads to a heightened risk of emails landing in spam folders, ultimately derailing campaign goals.

To check your domain reputation, you can use a variety of online IP reputation checker tools and services. These tools provide valuable insights into where you currently stand, giving you a clear starting point. But if your score isn’t where it should be, every email you send could be quietly sabotaging your reach, your conversions, and your brand.

In the next section, we’ll break down exactly what’s at stake and how to turn your domain into a deliverability powerhouse.

What is Domain Reputation?

Domain or IP reputation reputation is your email sender reputation which functions similarly to a credit score. It is a score that Internet Service Providers (ISPs) give to you based on your email sending history, typically on a scale of 0 to 100. Domain reputation determines how your domain is perceived by email service providers (like Outlook, Yahoo, Gmail, etc.). You can consider it as the health or condition of your branded domain. The better the reputation (closer to 100), the lesser the bounce-back frequency, as recipients’ mailboxes regard you as a trusted sender. A good email reputation means that you can send emails to your customers through the most appropriate channels. When someone receives an email from you, they are more likely to trust it if they know you have a good reputation.

Internet service providers, mailbox and email providers are the primary players in deciding where your email should land- inbox or spam folder. Domain reputation is one of the main factors considered while making this decision.

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Why Domain Reputation Lookup Matters

Having your domain in DNS blocklists, IP Blocklists, or email blacklists can have a serious impact on your IP reputation and email marketing performance. Blocklists are the suspension rooms of the internet where suspicious or spammy domain names are lodged. If you domain ends up in a domain or IP blocklist, you need to act fast! This can significantly (negatively) impact your email deliverability and the overall performance of your email marketing campaigns. It will make it harder for your marketing emails to email recipients. A bad domain site reputation could send your communications to the spam folder instead of the inbox. Additionally, if your domain’s reputation is poor, even transactional emails like order confirmations and delivery updates may land in the spam folder. The last thing you want is for your valid emails to suffer due to bad email reputation.

When performing a domain reputation check, it’s important to also evaluate the reputation of any associated subdomains. Subdomains can sometimes be exploited by malicious actors to carry out phishing attacks or distribute malware. Ensuring that all subdomains maintain a positive reputation is crucial for protecting your overall domain integrity and maintaining the trust of your users.

Thus, regular domain reputation lookups are necessary to ensure all your emails reach targeted recipients’ inboxes only. It also helps you know if someone is using your brand’s domain for phishing or other malicious activities in your name. In 2021, 83% of brands reported experiencing phishing attacks, and by the end of 2022, cybersecurity experts are anticipating an additional six billion attacks.

Domain Reputation Vs. IP Reputation

Feature	Email Domain Reputation	IP Reputation
Definition	Measures the trustworthiness of the sender's domain in emails.	Measures the trustworthiness of the IP address sending emails.
Scope	Focuses on the domain part of the email address (e.g., example.com).	Focuses on the IP address used to send the email.
Factors Affecting Reputation	Email content quality, sender's domain history, DKIM/SPF/DMARC records, engagement rates.	Spam history, blacklisting status, frequency of email sending.
Impact on Email Delivery	High domain reputation improves inbox placement rates and overall deliverability.	High IP reputation ensures emails are not marked as spam or blocked.
Resolution Methods	Implementing DMARC, DKIM, SPF, maintaining good sender practices.	Removing from IP blocklists, reducing spammy behavior.

How to Check Domain Reputation

Receivers’ mailboxes track how your domain is used in messages and how those messages perform, then assign scores using complex algorithms. Each email service provider (ESP) calculates its own reputation for your domain. Gmail has a single domain reputation, Yahoo another, based only on the emails they receive from you. These scores influence whether your future emails are trusted or flagged as spam.

Since every ESP’s scoring process is different, a domain can have multiple reputations at once. Reputation lookup tools often compile scores from several providers to give you an average, but it’s important to monitor each platform individually to maintain strong deliverability.

Use Domain Reputation Checker Tools

The easiest way to assess your domain’s reputation is to use specialized reputation checker tools. These services pull data from email providers, blacklists, and other sources to tell you whether your domain is trusted or raising red flags.

PowerDMARC reputation monitoring tool: PowerDMARC’s reputation monitoring tool is a domain reputation check tool that helps you monitor 200+ RBLs, real-time databases, and domain blocklists. Simply enter your domain name or IP address to check global blocklists. To get started with your domain reputation lookup simply sign up on PowerDMARC and navigate to “Reputation Monitoring” in the lefthand side menu bar.
TrustedSource by McAfee: TrustedSource, created by McAfee, is an online system that evaluates the IP reputation, URL reputation, domain reputation, email, etc. Using TrustedSource you can check if your URL is listed within Trellix’s databases.
Microsoft SNDS: Microsoft SNDS (Smart Network Data Services) helps you uncover your sender score, spam score, and IP reputation. SNDS analyzer network traffic, email volume, and other factors like spam history and complaints to assign your sender score and reputation.
Google Postmaster tools: Postmaster tools have a wide range of features including information on IP and domain reputation, spam rate, email authentication, and deliverability errors specifically for Gmail. All you need is a Google account to access these tools.
Spamhaus: Spamhaus maintains email blocklists and has a domain blocklist checker tool that will confirm whether your domain is present in any of those blocklists.

Monitor Email Metrics

Your email campaign metrics can also reveal early warning signs of domain reputation problems. A high bounce rate may indicate you’re sending to invalid or outdated addresses, which hurts your standing with ISPs. A sudden drop in open rates could mean your emails are being filtered into spam folders.

Even a small rise in spam complaints can quickly lower your score, while consistently high unsubscribe rates may signal to providers that your messages are irrelevant or excessive. Tracking these metrics closely enables you to address problems before they harm your domain’s credibility. You can also use a local rank tracker to monitor how your emails and associated content are performing in specific regions, helping to fine-tune your outreach strategy.

Run a Blacklist Check

Being on a blacklist can stop your emails from ever reaching recipients. Tools like MXToolbox or other blacklist check services let you see if your domain or IP has been flagged. If you find yourself listed, follow the specific removal instructions provided by that blacklist, then address the underlying cause, such as poor list hygiene, spammy content, or a compromised account, to prevent future listings. Regular blacklist checks are an important safeguard for keeping your emails in the inbox.

Factors That Affect Your Domain/IP Reputation

Emails are inevitable in today’s corporate structure, and companies can’t afford a bad domain reputation. Your email-sending habits have the most significant impact. There are numerous factors affecting it, and below are the major ones.

Blocklisting

Mailbox and internet service providers blocklist suspicious domains to prevent cybercrimes like phishing and email spoofing. A domain is blocklisted when recipients mark emails coming from it as spam. Aggressive or poorly targeted outreach for activities like link building can increase spam complaints and negatively impact engagement signals if not handled carefully.

You must avoid email blocklisting to improve your domain reputation. Cleaning your email list regularly and validating new subscribers’ addresses will help.

Poor Engagement Rate

A high unsubscribe rate and poor engagement among recipients result in a poor domain reputation. This is one of the deciding factors used by ESPs and ISPs to give a score to your domain.

Optimizing subject lines, conducting A/B testing, fun copies, adding a call to action button, testing accessibility with usability testing software, etc., are some practical ways to get a healthy engagement rate and improve domain reputation.

Spam Traps

Spam tracks refer to fake email addresses found by blocklisting services in hidden locations. So, educate yourself and your team not to send emails to spam tracks as it deteriorates the email deliverability rate.

Regular domain reputation checks can help you understand mistakes you might be making while handling emails.

Domain Age

Domain age is described as the length of your domain’s existence, and anti-spam filters use it for their processes. Newer domains often start with a neutral or lower reputation. If you want to analyze your domain in depth, consider using alternatives to Wayback Machine to access archived content. You can warm it up by sending your database cold email outreach messages gradually to improve domain reputation.

Inconsistency in Volume

Genuine freelance marketers expand their email database as the business grows. This means they send more emails as their business grows old. However, sudden large spikes or drops in sending volume can appear suspicious to ISPs. If these numbers are inconsistent, your domain reputation will be hampered, so ensure sending emails at the right frequency and timing. Establishing a regular campaign schedule helps build trust and prevents sending spikes that harm your sender score.

How to Improve Domain Reputation?

Domain reputation depends on your email-sending behaviour. Follow these tips to keep it healthy.

Warm-Up Your IP Address

New IP addresses have no reputation, and sending hundreds of emails using that will make your domain look spammy. Spammers frequently change their IP addresses to avoid blocklists, so ISPs are wary of high volume from new IPs. So, increase the number over a few weeks (often around 15 days) instead of maxing out at the start only. Start with a small volume (e.g., 100 emails daily) and gradually increase it.

Use Email Authentication Protocols

Email authentication protocols are essential and prevent spammers from misusing your domain name to send fraudulent and phishing emails. Email servers use these technologies to confirm that your emails are legitimate and not harmful.

SPF

SPF (Sender Policy Framework) uses a list of IP addresses authorized to send emails using your domain. It helps verify the sender’s identity. You can direct the recipients’ mailboxes on how to treat emails coming from unauthorized IP addresses- none, quarantine, or reject.

DKIM

DKIM (DomainKeys Identified Mail) uses cryptographic signatures added to email headers to verify the authenticity of the senders and ensure the email hasn’t been tampered with in transit. It prevents man-in-the-middle attacks and other malicious activities.

DMARC

A DMARC (Domain-based Message Authentication, Reporting, and Conformance) record is a TXT record published to DNS to tell receiving email servers your domain’s policy after checking SPF and DKIM status. DMARC authenticates if either SPF, DKIM, or both pass and align with the sending domain. This is referred to as DMARC alignment or identifier alignment. It also provides reporting on emails sent using your domain.

BIMI

With BIMI (Brand Indicators for Message Identification), domain owners and brands control officially displayed logos, which are maintained consistently in all inbound emails for participating mailbox providers, further enhancing trust and brand recognition (requires DMARC enforcement).

Send Consistent Volume and Relevant Emails

Another effective way to maintain a good domain reputation is to send relevant, engaging, and value-adding emails to get a high opening rate. You never know, subscribers might forward them if they’re valuable. Maintain a consistent sending schedule and volume to avoid sudden spikes that can trigger spam filters.

Verify Your Subscribers and Maintain List Hygiene

Regularly clean your email lists. Use validation tools or qualified validation specialists to purge inactive, invalid, and passive users (including spam traps) from your sending lists. Reducing bounce rates and ensuring you only email receptive clients protects your reputation from spam-related issues. Segmenting your audience effectively and utilizing tools to get emails from reliable sources like LinkedIn Sales Navigator can aid in targeted outreach, improving engagement.

Avoid Link Shorteners

While they might seem convenient, link shorteners are often abused by spammers and hackers to hide malicious URLs. Consequently, spam filters are often suspicious of shortened links. Use full URLs whenever possible to avoid potential deliverability issues.

Monitor Your Sender Score

Actively monitor your sender score or domain reputation using the tools mentioned earlier. A sender score typically ranges from 0 to 100; ideally, you should work to keep it consistently high, often aiming for over 90, to ensure optimal deliverability.

Conclusion

It isn’t easy to get email deliverability right, but it isn’t impossible, either. The best way is to ensure a healthy domain reputation, which can be achieved by using email authentication protocols, sending high-quality and relevant content, maintaining list hygiene, adhering to consistent sending practices, and actively monitoring your reputation metrics. Knowing the different sender reputations, ensuring your content is pertinent to your domain category and meets readers’ expectations, and keeping track of campaign analytics can help ensure every reader receives your email.

To make this process easier and more effective, consider using PowerDMARC’s Reputation Monitoring Tool, which consolidates key metrics, monitors authentication compliance, and alerts you to potential issues before they impact your deliverability.

Frequently Asked Questions (FAQs)

How often should I check my domain reputation?

It’s best to check your domain reputation at least once a month, or more frequently if you send high volumes of email. Regular monitoring helps you spot problems early, such as being added to a blacklist or experiencing a drop in engagement, so you can act before your deliverability suffers.

Does domain reputation affect SEO rankings?

Domain reputation for email is separate from your website’s search engine ranking. While poor email practices won’t directly hurt your SEO, they can indirectly impact your brand’s visibility by reducing engagement, damaging trust, and limiting the reach of your marketing campaigns.

Can I recover a blacklisted domain?

Yes, a blacklisted domain can usually be recovered. First, identify the reason for the listing—whether it’s due to spam complaints, sending to invalid addresses, or a compromised account. Then, correct the issue, improve your email practices, and submit a removal request to the blacklist operator. Recovery times vary depending on the provider and the severity of the offense.

About
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Ahona Rudra

Domain & Email Security Expert at PowerDMARC

Ahona is the Marketing Manager at PowerDMARC, with 5+ years of experience in writing about cybersecurity topics, specializing in domain and email security. Ahona holds a post-graduation degree in Journalism and Communications, solidifying her career in the security sector since 2019.

How to Check Domain Reputation: Tools and Tips