See if your domain or mail server is on a public spam blocklist.
Checked with public DNS lookups. Nothing is stored.
Some lists only answer approved servers. That is not a listing.
Find what sent the spam (a hacked account or a bad list), fix it, then ask the list to remove you from its website.
We build business websites in 7 days and web apps in weeks, for a fixed price. Then we automate the busywork around them.
Book a free strategy callThe Blacklist Check tests your domain and mail server IPs against the main spam blocklists. Being listed is a common reason emails suddenly stop arriving.
These tools handle the paperwork and email setup a small business needs every week, without a subscription. Documents are made in your browser and download as clean PDFs. When the paperwork outgrows a free tool, we build the website, client portal or system that does it for you.
More free tools: see every tool.