Block Email Domains Easily & Securely
Instantly block entire domains (or single addresses) from your outbound email streams – with just a few clicks.
Sometimes you need to make sure emails never reach certain users or companies—whether for compliance, safety, or peace of mind.
NotifiedBy makes it easy to block unwanted addresses or entire domains, instantly and securely:
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Block entire domains with a wildcard.
Enter*@spam.comto block every address at that domain in one step. -
Fast manual addition.
Paste or enter a list (one per line) to block multiple addresses or domains at once. -
Full control and security.
Stay in charge of who gets your emails — protect your service against test accounts, competitors, or accidental sends. -
Live, always-accessible block list.
Review, add, and remove blocks directly from your dashboard, anytime.
Example: Blocking
*@spam.com instantly stops all future email to any @spam.com address.
How it works
- Visit your block list in the NotifiedBy dashboard—see all existing blocks at a glance.
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Add one or more domains or email addresses.
Paste (or type) addresses, using a*wildcard for complete domains (e.g.,*@spam.com). Add as many as you need at once. -
Enjoy instant protection:
No emails will be sent to anything matching those domains or addresses—now or in the future, until you remove the block.
Frequently asked
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Is this instant—do the blocks apply right away?
Yes! The moment you add a block, NotifiedBy will prevent emails to those recipients, with clear dashboard visibility. -
Can I unblock an address or domain later?
Absolutely. Remove blocks at any time and all normal delivery resumes for those addresses/domains. -
Can I combine domains and individual addresses?
Yes. List as many specific addresses or domains (with wildcards) as you need—in one step.
Take Control of Your Outbound Email
No more accidental emails to testers, spam traps, or unwanted users. Block with a click.