How to Check Your Email IP Reputation & Blacklists Online
Read more to find out how to check your email IP reputation online and what to do if you've been blacklisted.
Blacklist
Also known as: Blocklist, Denylist
An email blacklist is a list of IP addresses or domains that inbox providers treat as unsafe. If you are on one, your emails are more likely to land in spam or get blocked before they arrive.
An email blacklist is a list that email providers use when they decide which senders to trust. It collects IP addresses and domains that have caused problems in the past. When your details show up there, inboxes start to treat your messages with suspicion. Many of your emails will land in spam folders or never show up at all.
You usually get blacklisted when your email practices hurt recipient experience or trigger spam filters. This can come from high spam complaints, old or purchased lists, or missing authentication records. Being on a blacklist can cut your revenue and damage your sender reputation quickly. People who care about email performance track this closely and fix issues early.
If you find yourself on a blacklist, slow down and clean up before you send again. Remove cold or inactive contacts, confirm consent, and set up SPF, DKIM, and DMARC. Start sending to your most engaged subscribers first with small, targeted sends. Over time this helps rebuild trust with inbox providers and improves where your emails land.
Related Terms
Blocklist(Blacklist)
A blocklist is a list of IP addresses or domains that are known for sending bad or unwanted email. If you are on a blocklist, inbox providers often block or filter your messages before anyone can see them.
Learn more →Spam
Spam is any email sent to someone without their clear permission or after they have lost interest in hearing from you. It is email that feels unwanted or irrelevant to the person receiving it.
Learn more →List(Audience)
Your email list is the group of people who have asked to hear from you by email. It is an audience you own and can contact any time without relying on ads or social platforms.
Learn more →Seed List(Seed Addresses)
A seed list is a small group of test email addresses you add to campaigns so you can see if messages land in the inbox, spam, or other folders before you send to your full list.
Learn more →Related Articles About Blacklist
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