Check your sending reputation against the major email blocklists in seconds, then let us watch it for you, free.
We check your mail and website IPs against major email blocklists. Passive; nothing stored unless you ask for monitoring.
Email providers like Google and Microsoft consult blocklists (DNSBLs) before deciding whether your mail reaches the inbox. If your sending IP gets listed, usually because a mailbox or website on it was compromised and sent spam, a growing share of your quotes and invoices silently go to spam or bounce, and nobody tells you. Most small businesses only find out when a customer says "I never got your email." This tool checks your IPs against the major blocklists in seconds, and can watch them for you so you hear about a listing the day it happens, not weeks later.
Listed already? Reply to the alert and we will chase the delisting and the root cause. Email deliverability is part of our managed IT, and pairs with our email security checker.
A blocklist (or DNSBL) is a public list of IP addresses known to send spam. Mail servers check incoming mail against these lists and filter or reject anything from a listed sender. Being on one damages your deliverability everywhere at once.
Usually not on purpose. A compromised mailbox or a hacked website on your server starts sending spam, a mailing list generates complaints, or on shared hosting a bad neighbour gets the whole IP listed. Any of these can list you without your knowledge.
A curated set of major public blocklists that respond reliably: SpamCop, Barracuda, UCEPROTECT and s5h. We deliberately do not report lists that block automated checks, so a clean result here is meaningful rather than a false all-clear.
Those providers manage their own sending reputation, so their shared IPs are rarely listed. But your website's own IP still matters if it sends anything (contact forms, app notifications, newsletters), and a compromised site is a common way a small business lands on a blocklist.
Fix the cause first (secure the mailbox or website that was sending spam), then use each blocklist's removal process to request delisting. We can do both for you; reply to the alert email and we will handle it.
Belivanis Information Systems