As an email marketer one should be cautious about their reputation, this is a continuous process you can’t build good reputation overnight. To achieve this you have to follow the best guidelines throughout the year along with understanding your customer expectations. If you won’t do this you’ll lose out. The way you handle your email communication directly impact your sender reputation and your deliverability. Checkout below points to understand how it co-related.

What is a sender reputation?
Sender reputation is a calculation of all previous actions taken by a sending IP address, both good and bad. An incoming sender’s reputation allows mailbox providers to access who is trying to reach their inboxes and judge whether or not to deliver the incoming mail to the inbox or the spam folder.

To check this you can always use this tool – https://senderscore.org/

What contributes to your reputation?
There are hundreds of signals that factor into your reputation. Some can help boost your standing, while others harm your ability to reach the inbox. Below are some of the top elements mailbox providers are evaluating and you need to be paying attention to before they damage your deliverability.

Unknown users: An unknown user is generated when a sender deploys mail to a recipient that never existed, is no longer active by choice, or was abandoned by the end user. Mailbox providers send back a bounce code to senders to inform them that these addresses are no longer active and should be removed from a sending list.

Spam traps: There are two types of spam traps. Pristine traps are email addresses created for the sole purpose of catching spammers. These addresses were never owned by a real person and are often found as embedded links hidden in the background of websites. Recycled traps are email addresses that were once active addresses but have since been abandoned and are no longer in use. After spending time as unknown users, mailbox providers convert these discarded addresses into spam traps to catch senders who continue to send to unengaged senders. The purpose of a spam trap is to identify senders with “spammy” behavior. Sending to spam traps will drastically reduce your deliverability. There is no way of knowing the exact spam traps so better not use third party list just to increase your database.

Complaints: Complaints are end-user spam complaints that are calculated against the amount of mail you have sent for the past seven days. A complaint could be produced when an end user clicks on the “spam” or “junk” button within their inbox.

Disengaged Subscribers: Having a large portion of subscribers that don’t open or interact with your email consistently tells mailbox providers their users are not interested in your content and are unlikely to miss it. To provide a better experience for their users, mailbox providers incorporate prior subscriber engagement into their filtering decisions.

Blacklists: Backlisting refers to a list of IP addresses that spam filtering companies, mailbox providers, or anti-spam organizations report as “known” sources of spam. Frequent spam traps hits or complaints might prompt a blacklist organization to add your IP to a blacklist. When evaluating an incoming sender, mailbox providers will check these lists to see if the IP address appears. If it does, they may decide deliver the blacklisted senders mail to the spam folder.

These elements and more can keep you from your subscribers. Learn more about how Return Path from Validity can help you “send it” with confidence and effectively reach and engage subscribers by clicking here.

Pankaj Kumar is an Email Deliverability Expert and Product Leader with 13 years of experience in email deliverability, CRM, marketing analytics, deliverability onboarding, implementation, and automation. He combines deep technical expertise in email infrastructure, inbox placement, sender reputation, and authentication protocols with a product-driven approach to solving complex deliverability challenges at scale. Having worked with Zeta and Blueshift, Pankaj has helped hundreds of clients improve email performance through data-driven strategies, technical troubleshooting, and scalable automation. His focus extends beyond resolving deliverability issues to building smarter deliverability products, monitoring systems, and AI-powered solutions that help businesses proactively identify risks and improve inbox placement. Through his blog at University of Email, Pankaj shares practical insights on email deliverability, CRM strategy, marketing analytics, and emerging deliverability technologies to help email marketers and technical professionals make informed decisions and achieve better results. Connect with him on LinkedIn at https://www.linkedin.com/in/pankajkumar-deliverability

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