Blacklist monitoring
How SealedMail checks your domain and sending servers against major blacklists, so a listing is caught in days, not weeks.
If your domain lands on a blacklist, your email quietly stops arriving. Here is how SealedMail catches it in days, not weeks.
Watch: email blacklists in plain English
What blacklists are
Blacklists (also called blocklists) are shared databases of domains and servers associated with spam or abuse. Receivers consult them when deciding whether to accept your email. For the full detail, see our guide: Email blacklists: how to check yours
Why it matters to your business
If your domain or sending server is listed, often through no fault of your own, your email quietly stops arriving. Most businesses find out from a frustrated client, weeks later.
How SealedMail monitors it
Every health check, including the weekly one in your report, checks your status against major blacklists, so a listing is caught in days rather than weeks.
What commonly goes wrong
Shared hosting and shared sending services: someone else’s bad behaviour on the same infrastructure gets your mail blocked.
Want the full technical detail? Read our plain-English guide: Email blacklists: how to check yours
Scope: reporting only
SealedMail monitors, interprets and reports. It does not change your DNS, configure your systems, or remediate problems. Your reports tell you clearly what is wrong and what kind of fix is needed, and the changes remain in your hands (or your IT provider’s). That boundary keeps the service simple, affordable and honest.
