5 Tools to Check Your Sending Reputation | Twilio SendGrid (2022)

We always stress the importance of a strong sending reputation.Your sending reputation, or how mailbox providers judge your mail, is driven by how your subscribers are reacting to your messages. If the messages you send generate a lot of spam complaints, your sending reputation will worsen and future messages will be harder to get to the inbox.

On the other hand, if recipients are engaged with your messages, your sending reputation will be stronger and your messages will be more likely to make it to the inbox. Unfortunately, there is no single value or score that describes your sending reputation across all mailbox providers. However, there are a few tools, stats, and tips you can use to monitor and better understand your sending reputation.

While it is true that there is no singular score that all mailbox providers use to evaluate your sending, there are some third-party tools and even mailbox-specific tools help you track your sending reputation.All of these tools are based on different data sources and attempt to score senders based on their practices and results. As single sources of truth, these scores don’t often tell the entire story, but when used in conjunction with other data points, can be very helpful in identifying reputation issues. Some tools offering reputation scores are:

1. SenderScore.org

Like a credit score, a Sender Score is a measure of your reputation. Sender Score gives you a score from 0 to 100. The higher your score, the better your reputation and the higher your email deliverability rate. Numbers are calculated on a rolling 30-day average and illustrate where your IP address ranks against other IP addresses. This service is provided by Validity.

2. BarracudaCentral

Barracuda Networks provides both an IP reputation lookup and domain reputation lookup via their Barracuda Reputation System—a real-time database of IP addresses with “poor” or “good” reputations. You can check your IP score to see if you’ve made the nice or naughty list.

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3. TrustedSource

TrustedSource, run by McAfee, provides information on both your domain’s email reputation and web reputations as well as affiliations, domain name system (DNS), and mail server information. It also provides details on the history, activation, and associations of your domain.

4. Google Postmaster Tools

Google offers their Postmaster Tools to senders allowing you to track data on your high volume sending into Gmail. The helpful data they provide includes IP reputation check, domain reputation check, Gmail delivery errors, and more.

5. Microsoft SNDS

Similar to Google’s Postmaster Tools, Microsoft offers a service called Smart Network Data Services (SDNS). Among the data provided by SNDS is insight into data points like your sending IP’s reputation, how many Microsoft spam traps you are delivering to, and your spam complaint rate.

Not every mailbox provider gives you insight into how they view your sending reputation, but two of the largest mailbox providers do. Through Google Postmaster Tools and Microsoft SNDS, you can freely see a day-by-day evaluation of the reputation of the messages these major providers see from you. While Google’s and Microsoft’s view of your sending reputation has no impact on how other providers see your mail, it’s a good bet that troubles at these major providers will be accompanied by similar troubles elsewhere.

Reputation is one part of a healthy email program

While each of these data points is a great help in evaluating your sending reputation, none of them, singularly, tell a complete story. For example, it is not uncommon to see email senders with SenderScores around 98-99 that are still having inboxing problems.

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It’s important to know that just because you have a high reputation score from a third party or don’t have any deny listings, doesn’t mean you won’t be getting throttled, sent to the spam folder, or blocked outright.

When taken into account together, the scores from the tools above and the insights and tips recommended below will give you a very good idea of how your current sending reputation stands with mailbox providers.

Review your statistics over time to identify trends

All senders’ reputations change over time.

Understanding how your statistics are trending is critical to understanding how your overall reputation is changing. Since sending reputation is all about how much of your email makes it to the inbox, seeing trends like decreasing open rates or increasing spam complaint rates tend to be the most reliable indicators of existing or pending reputation degradation.

Conversely, seeing improving delivery or open rates over time can indicate that your sending reputation is improving. Since each mailbox provider operates a little bit differently, it is even more helpful if you can keep an eye on these changes on a domain-by-domain basis to identify specific reputation issues at specific providers.

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Regularly look for IP and domain deny listings

When your email sending is generating too many negative signals such as spam complaints or delivery to spam traps or honeypot addresses, it is likely you will see increased deny listings of your IP, your domain, or both. While not all deny lists have a significant impact on your delivery rates, seeing increases in deny listing events for your sending is an indicator that your sending reputation is suffering. A great, free tool to use to keep an eye out for deny listings is https://mxtoolbox.com/blacklists.aspx.

Send yourself messages

It’s never a bad idea to send yourself messages as if you were a recipient.

If you have multiple email addresses at different mailbox providers, send to them all. While you can never make broad assumptions about how a mailbox provider is treating all of your mail based on results to a single address, seeing changes in how your emails are landing in your inboxes or spam folders can be a good indication that your reputation may be degrading, especially when combined with other data points. Just remember to do yourself a favor and positively engage with your messages. If they do land in your spam folder, pull them back into your inbox.

Improve your sending reputation proactively

While these tools help you check your sending reputation, domain reputation, IP reputation, spam score, and the like, senders typically only use them reactively. Once they notice a problem, that’s when they start getting concerned about reputation authority.

Regardless of your scores, be proactive about protecting your reputation. Follow email best practices to keep yourself on good terms with all the inbox providers.

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Twilio SendGrid also provides a few tools to help you take control of your sender reputation:

  • Email Testing
  • Email Address Validation API
  • Deliverability Insights

Email Testing

Twilio SendGrid’s Email Testing tool helps you send emails with confidence by catching errors before you press “send.”

  • Spam Score Checker:The tool will analyze your emails and alert you to spammy-looking content that’s likely to trigger spam filters. We’ll run your email through a few of the most popular spam check platforms to give you a good idea of how your content will perform.
  • Link Checker:We’ll crawl your email to ensure you don’t send a message with broken links. You can check every URL with a single link to ensure it goes to the right place. We’ll even make recommendations if your link directs to a site with a poor domain reputation or too many redirects.
  • Inbox Render Test:We show you how your email will look across clients, browsers, and devices to ensure your message looks great no matter where it gets opened.

Email Address Validation API

Twilio SendGrid’s Email Address Validation IP helps improve your email deliverability by validating email addresses before you send. Our real-time API monitors your email list to ensure mistyped, inactive, non-existent, and disposable emails don’t join.

A clean list reduces your bounce rates and improves your sending reputation with mailbox providers. And that means better delivery rates for you.

Deliverability Insights

Twilio SendGrid’s Deliverability Insights provides you with a single dashboard to monitor and improve your email program. You can check email deliverability metrics at a glance and see the data the matters most.

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It’s all packaged into an actionable and easy-to-digest format. That means you don’t have to waste time digging through menus and tabs to find the data you need.


Your email reputation is always in your control. Take advantage of these tools and tactics to gain more accurate visibility into how the mailbox providers view your mail. These data points signal whether or not your mail is seen as wanted by recipients. So the more proactive you can be with your email deliverability, the better.

If you’re interested in having a partner to helpwith your sending reputation and email deliverability, check out SendGrid. Our Expert Services offer over 130 years of combined email industry experience to ensure your email program is set up for success.


5 Tools to Check Your Sending Reputation | Twilio SendGrid? ›

5 tools to check your sending reputation
  • SenderScore.org.
  • BarracudaCentral.
  • TrustedSource.
  • Google Postmaster Tools.
  • Microsoft SNDS.
Jun 7, 2022

How do I check my SendGrid reputation? ›

Once logged in to your account, on the left side of your SendGrid.com dashboard, you can find your SendGrid account reputation. It's your IP reputation score, which will be somewhere from 0% to 100%. This score will go up or down based on your bounce, block, spam and invalid rates.

What is a good sender score? ›

Whether you are on the high or low end of the Sender Score spectrum, there's always room for improvement. If your Sender Score is below 70, you need to repair your sender reputation.

How do I find my IP reputation score? ›

Tools to check your IP reputation
  1. Google Postmaster Domain and IP Reputation Dashboard. This is one of the most accurate data providers since Google owns and controls a lot of data. ...
  2. 2. Mail Tester. ...
  3. Cisco Talos Intelligence IP and Domain Reputation Checker. ...
  4. SenderScore. ...
  5. Cyren IP Reputation Checker.
May 11, 2020

How do I improve my email reputation score? ›

So let's get right into the steps you can take to improve your domain reputation starting from your next campaign.
  1. Decrease your email sending frequency. ...
  2. Clean up your Email lists. ...
  3. An Unsubscribe Button. ...
  4. Send Really Good Emails. ...
  5. Catchy Subject Lines. ...
  6. Use Personalization.
May 31, 2020


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