Ban Subdomain Emails
Prevent people from registering with emails that contain a subdomain to help reduce spam.
Consider an alternative
Ban Subdomain Emails shows warning signs in 2026 — compare the alternatives below before installing. It runs on 10+ sites, is rated 5/5 and was last updated 10 years ago, and scores 30/100 on our health check.
- Small user base (10+ active installs)
- Very few reviews so far
- No update in 10 years
- Only tested up to WordPress 4.5 (latest is 7.1)
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where Ban Subdomain Emails stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| akismet | >100 |
| ban | >100 |
| >100 | |
| registration | >100 |
| spam | >100 |
Version adoption
Share of active sites per release.
Rating breakdown
★★★★★★★★★★ 5 from 1 reviews
About Ban Subdomain Emails
From the official readme · v1.0.0Description
A lot of registration spam comes from emails with a subdomain. Spammers control a domain such as buymyjunk.com and then attempt to register on your site with emails such as irenemwd@foster2.buymyjunk.com and jakemgm@foster7.buymyjunk.com. This plugin simply blocks all registrations using a subdomain.
Reputable users will have a normal email address from a reasonable domain like @gmail.com, @mylegitbusiness.com, @outlook.com, @myschool.edu, etc.
There is no configuration and no setup. It simply just works. The plugin logs all blocked registrations so you can find potential false-positives. Find a link to this log file on the Plugins page where you activate/deactivate this plugin.
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FAQ
Ban Subdomain Emails: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 10, 2026
Is Ban Subdomain Emails free?
Yes. Ban Subdomain Emails is free to download and use from the official WordPress.org plugin directory.
Is Ban Subdomain Emails safe to use in 2026?
Ban Subdomain Emails shows warning signs in 2026 — compare the alternatives below before installing. It runs on 10+ sites, is rated 5/5 and was last updated 10 years ago, and scores 30/100 on our health check.
How many websites use Ban Subdomain Emails?
Ban Subdomain Emails is active on 10+ WordPress websites and has been downloaded 2,333 times since it launched in April 2016. It was downloaded 90 times in the last 30 days.
Does Ban Subdomain Emails work with WordPress 7.1?
Ban Subdomain Emails is officially tested up to WordPress 4.5.33, while the latest release is 7.1.3. It may still work, but try it on a staging site first.
When was Ban Subdomain Emails last updated?
The latest version, 1.0.0, was released on April 27, 2016 (10 years ago).
Who makes Ban Subdomain Emails?
Ban Subdomain Emails is developed and maintained by jamiechong.
What are the best alternatives to Ban Subdomain Emails?
The most popular alternatives to Ban Subdomain Emails are WP Armour (400K+ installs), Honeypot Anti-Spam (10K+ installs) and FV Antispam (900+ installs).
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