When it comes to the email campaign, you want the emails to get to your subscribers’ inboxes. To make sure they will, you need to take care of your deliverability. Among many factors that affect the deliverability, the email sender reputation plays a tremendous role.

Do you know how to check the reputation? Here are 5 websites that will help you check your email sender reputation and keep you on track:

1. SenderScore.org

Sender Score uses a scoring system that based on a scale of 0 to 100, where 0 is the worst, and 100 is the best possible score. A score represents that IP address’s rank as measured against other IP addresses, much like a percentile ranking.

Sender Score is derived from a proprietary Return Path algorithm and represents an IP address’s overall performance against metrics important to both ISPs and their customers who receive your email. For senders, this score represents the overall health of your email programs as they appear to receive systems. In most cases, scores are calculated on a rolling 30-day average.

senderscore microsoft

Sender Score Metrics for microsoft.com


2. TalosIntelligence.com

The Talos IP and Domain Reputation Center is the world’s most comprehensive real-time threat detection network. It is a product of Cisco and provides you with the tools to check your reputation by ranking you as Good, Neutral, or Poor. Good means there is little or no threat activity. Neutral means your IP address or domain is within acceptable parameters, but may still be filtered or blocked. Poor means there is a problematic level of threat activity and you are likely to be filtered or blocked.

talosintelligence microsoft

Talos Email Reputation Look Up for microsoft.com


3. ReputationAuthority.org

You can look up your IP address or domain, receive a reputation score from 0-100, and get the percentage of emails that were good versus bad.

ReputationAuthority uses Domain Reputation increases the effectiveness by examining not only the IP reputation of a sender but also the domain and sender information from that IP address. A domain can receive a reputation independent of the behavior of the IP address from which it originates, and independent from other domains originating from the same IP address.


ReputationAuthority email reputation look up for microsoft.com


4. BarracudaCentral.org

Barracuda Central maintains a history of IP addresses for both known spammers as well as senders with good email practices. This information contributes to the Barracuda Reputation System, which gives the Barracuda Spam & Virus Firewall the ability to block or allow a message based on the sender’s IP address. In addition to IP reputation, the Barracuda Central team maintains reputation on URLs, which gives the Barracuda Spam & Virus Firewall the ability to quickly block an email based on a poorly-rated URL contained in the message. By combining both the IP and reputation data, Barracuda Networks can easily determine whether a message is a spam or legitimate email.


Barracuda reputation lookup for microsoft.com


5. MxToolBox.com

MxToolBox.com’s blacklists check tool to test a mail server IP address against over 100 DNS based email blacklists. (Commonly called Real-time blacklist, DNSBL or RBL). If your mail server has been blacklisted, some email you send may not be delivered.


MxToolBox blacklists lookup for microsoft.com


What is email sender reputation?

An email sender reputation is a score that an Internet Service Provider (ISP) assigns to the specific email sender (mail server or domain) that sends an email. It’s a crucial component of your email deliverability. The higher the score, the more likely an ISP will deliver emails to the inbox of recipients on their network. If the score falls below a certain threshold, the ISP may send messages to recipients’ spam folder or even reject them.

Email sender reputation factors:

  • The amount of email sent.
  • How many recipients mark the sender emails as spam or complain to the ISP about the messages.
  • How often the sender’s emails hit the ISP’s spam trap.
  • The sender’s inclusion on different blacklists.
  • How many of the sender’s emails hard bounce.
  • How many recipients open, reply to, forward, and delete the sender’s messages, as well as click the links.
  • How many recipients unsubscribe from the sender’s email list.

Learn more: How to Send Bulk Email Without Spamming?