Block a sender or a domain
Say no once.

Turn away one address, or everything from a domain, straight from the message in front of you. Each block names the rule that caught the sender, and one click lifts it.

In short

What does blocking an email sender do?

Blocking turns away mail from one address, or from every address on a domain. Unlike a spam filter's guess, it is your own decision, however legitimate the sender. Some services file it under Spam, others refuse it.

How it works

The person or the whole firm

A message's ⋯ menu offers the address and its domain: a recruiter is a person, a recruitment firm is a domain. The Details table and Contacts can block the address too.

Patterns catch a whole family

* stands for any run of characters and ? for exactly one, so news-*@shop.com stops every dated newsletter. A rule that would match almost everything is refused.

Refused, not piled into Spam

When the address that sent it matches, the message is refused and the bounce names no rule. When only the From line matches, as with a mailing list, it goes to Spam.

Pattern syntax

Blocked senders and Blocked domains both take patterns. A rule needs at least two letters or digits.

*any run of characters?exactly one characternoreply@*noreply at every domain*.example.comevery subdomain, as a blocked domain

What you get

In the product today

Plus-tags covered

Blocking [email protected] also blocks [email protected].

Subdomains covered

A blocked domain covers every subdomain beneath it.

Paste a whole list

Commas, spaces and new lines all separate entries.

A Blocked filter

Contacts can narrow to blocked people, and each one shows its rule.

Good practice

Getting the most out of it

  1. 01

    Spare shared domains

    Block someone on gmail.com by address, since blocking the domain stops everyone who uses it.

  2. 02

    Clear the backlog yourself

    Blocking leaves old mail alone, so search from:[email protected] and delete what you no longer want.

  3. 03

    Check before you chase

    If someone has gone quiet, try the Blocked filter in Contacts before writing again.

Questions

Asked often

Keep going

Works well with

Phishing & spam filtering

Mail the sending domain itself disowns lands in Spam rather than the inbox.

Rules you write yourself

Your own conditions, and what should happen to anything that matches them.

Bad-language filter

Mail carrying the words you do not want to read does not open in front of you.

Start

Your domain,
your mail.

Point a domain at OpenEmail and read it in a mailbox built around it. The free plan covers one domain.

Your inbox,
on your own terms.

Email infrastructure for businesses, AI, agents and personal email. Built for scale, privacy and control. Everything email should have had from day one.

OpenEmail

Email infrastructure for businesses, AI, agents and personal email. Built for scale, privacy and control. Everything email should have had from day one.

© 2026 OpenEmail. All rights reserved.