Sender Reputation: 9 places to test for free


So you want to know what your sender reputation is? There are a number of online tools that will test your IP address and give you your reputation score. If you do not know what Reputation is, why it is important and what it is all about then you should read this article first.

So to the top tools for identifying your sender reputation are as follows….

SendMail Reputation Tool

Trend Micro, Symantec, Sophos, Kaspersky, Avira and many other mail filters make use of SendMail Repuation data when deciding whether or not your message belongs in the spam folder.

TrustedSource from McAfee

TrustedSource is incorporated into all the products across McAfee’s appliance and service suite, as well as into appliances and services of other companies and organizations.

AOL Postmaster

AOL provide a very quick and easy way to see what they consider your current reputation as a mail sender to be on the “AOL Check IP Tool”. Postmaster

Requires registration, but this is essential reading if you have a proportion of your database using or Hotmail address’

Outblaze Reputation Check

Outblaze hosts webmail services for several thousand domains, with userbases ranging from a few thousand to several million mailboxes.  Their total userbase exceeds 40 million mailboxes. The lookup tool incorporates some major blacklists including the Spamhaus SBL , Spamhaus XBL and the Spamhaus PBL

Barracuda Reputation

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. Barracuda is utilised by over 85,000 business worldwide. This includes the US Department of Homeland Security, University of Georgia, Charlotte-Mecklenburg Police Department, countless school districts and tens of thousands of smaller business and governmental organisations.

SecureCloud from Trend Micro

The SecureCloud website allows you to do a reputation check against Trend Micros “Smart Protection Network”. A variety of SME and Enterprise level business’ use this resource for gauging IP Reputation.

Sender Score

Sender Score is a free service offering from ReturnPath. It aggregates data from 60 million mailboxes at a variety of ISPs, spam filtering and security companies.  On some level Yahoo!, Windows Live Hotmail, Spam Assassin, IronPort Systems and others make use of SenderScore data. That said you can achieve good deliverability with those ISP’s and still not show on the SenderScore radar.

Still need to check the blacklists

You still need to make sure your not on any of the major blacklists and possibly clean up any listings on the smaller blacklists. To help you identify whether your listed has a tool that checks over 100 blocklists to see whether you are listed.

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emailexpert is published by Andrew Bonar, the founder of the company Deliverability which is incorporated in Australia, Hong Kong and the United Kingdom. Deliverability has included Dotmailer, GetResponse,, SendLane and other ESPs as clients. Having launched his first website in 1990, he went on to become the co-founder of @POBox UK in 1993, a free email address provider, possibly the first in the world. Thereafter launching Cheapnet which became the longest running privately owned ISP in Europe before launching the first privately owned online payment gateway in the UK: Ebanx. Andrew has consulted to some of the worlds biggest senders including Amazon, Mondelez and Nestle. 2012 in his role as Global Deliverability Director at Emailvision was the first time he oversaw the delivery of more than 100 Biillion messages in a single year. Since that time he has provisioned consultancy or performed leadership roles at some of Australia's most successful tech companies. Including Campaign Monitor, and Kogan. With 21+ years of industry experience, Andrew is widely recognised as a leader in the field of message sending, deliverability and compliance. He currently resides in the Harbour City of Sydney and continues to serve as an independent consultant at organisations throughout Europe, the Middle East, Asia Pacific and the US.


  1. These are great tips that I will try out, I am glad I ran into it. Thanks.

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