How to Blacklist an Email Address in Gmail

Gmail doesn't use the word "blacklist" in its interface, but the concept is straightforward: you want emails from a specific sender to stop reaching your inbox — permanently, automatically, and without manual effort. Gmail gives you a few ways to accomplish this, and which approach works best depends on what you're actually trying to achieve.

What "Blacklisting" Really Means in Gmail

In email terms, blacklisting a sender means any message from that address is either blocked outright, automatically deleted, or redirected away from your inbox before you ever see it. Gmail doesn't have a single button labeled "blacklist," but it offers two core tools that accomplish the same result:

• Block Sender — a built-in Gmail feature
• Filters — Gmail's rule-based automation system

Both are legitimate approaches, but they behave differently. Understanding that difference matters before you pick one.

Option 1: Using Gmail's Block Sender Feature

This is the quickest method and requires no technical setup.

How it works:

1. Open an email from the sender you want to block
2. Click the three-dot menu (⋮) in the top-right corner of the message
3. Select "Block [Sender Name]"
4. Confirm when prompted

Once blocked, future messages from that address are automatically sent to your Spam folder rather than your inbox. They aren't deleted — they sit in Spam for 30 days before Gmail clears them automatically.

What this means in practice: The sender is effectively invisible to your daily workflow, but the emails still technically arrive and get stored temporarily. If you're blocking someone for privacy or harassment reasons and want zero trace of their messages, this distinction matters.

You can view and manage your blocked senders list by going to Settings → See all settings → Filters and Blocked Addresses.

Option 2: Using Gmail Filters to Delete or Redirect Emails

Filters give you more control. Instead of routing messages to Spam, you can tell Gmail to permanently delete messages from a specific address the moment they arrive.

How to create a filter:

1. Go to Settings → See all settings → Filters and Blocked Addresses
2. Click "Create a new filter"
3. In the "From" field, enter the email address you want to block
4. Click "Create filter"
5. Choose an action — the most thorough option is "Delete it"
6. Click "Create filter" again to confirm

With Delete it selected, messages from that sender skip your inbox and go directly to Trash, where they're purged after 30 days. If you want them gone immediately and completely, you can also check "Also apply filter to matching conversations" when setting it up.

Filters are also more flexible than the Block feature. You can filter by:

• Exact email address (e.g., [email protected])
• Entire domain (e.g., @spammydomain.com) — useful if you're getting messages from multiple addresses at the same domain
• Specific keywords in the subject or body

🔍 Block Sender vs. Filter: Key Differences

Blocking on Gmail Mobile (iOS and Android)

The Block Sender feature works the same way on the Gmail app:

1. Open the message
2. Tap the three-dot menu in the top-right corner
3. Select "Block [Sender Name]"

Managing filters, however, requires the desktop version of Gmail (or Gmail in a mobile browser with desktop view enabled). The Gmail mobile app doesn't expose the filter creation interface directly.

Variables That Affect Which Method Makes Sense

The "right" approach isn't universal — it shifts based on your situation:

Why you're blocking matters. If you're dealing with a persistent harasser or unwanted contact and want no record of their messages, a delete-on-arrival filter is more thorough than Block Sender, which still stores messages in Spam.

Volume of unwanted mail matters. If you're being hit by messages from multiple addresses at the same domain, a domain-level filter (blocking all of @example.com) is far more efficient than blocking addresses one at a time.

Your account type matters. Personal Gmail accounts and Google Workspace (business/school) accounts both support Block and Filters, but Workspace admins can also configure email routing rules and blocked sender lists at the organizational level — giving IT teams tools that individual users don't have.

Whether you use Gmail as an email client for other accounts matters. If you access a non-Gmail address through Gmail (via POP/IMAP), filters still apply to mail pulled into that inbox, but how effectively depends on how Gmail processes the headers of forwarded or fetched mail.

A Note on Spoofed Addresses and Persistent Spam 🚫

Blocking a specific email address is effective against a sender who consistently uses the same address. It's less effective against spam operations that rotate sender addresses or spoofers who forge the "From" field. In those cases, filtering by keywords, subject lines, or entire domains tends to be more resilient than per-address blocking.

Gmail's built-in spam detection also operates independently of your manual blocks — so especially persistent unwanted mail may already be caught by spam filters before it even reaches your inbox.

Whether the Block feature, a delete filter, or a combination of both is the right call comes down to the specific sender behavior you're dealing with, how your Gmail account is structured, and how completely you want those messages to disappear.