Comparison · generated on request
Host Header Injection Fix vs Registration Email Blocker
Both plugins as this registry currently observes them. Figures come from the same daily snapshot, so they are directly comparable, which two separate wordpress.org pages, read minutes apart, are not.
| Host Header Injection Fix | Registration Email Blocker | |
|---|---|---|
| What it does | Sets custom headers for WP notification emails. Also fixes a security issue with WP versions < 5.5. | Block unwanted email domains during user registration. Helps Russian site owners comply with Federal Law 406-FZ requirements for user registration. |
| Active installs | 400+ | 100+ |
| Rating | 5.0★ (6) | — |
| Last release | 2 months ago | 7 months ago |
| Current owner | Jeff Starr | Patsikov Artem |
| Added to directory | 06 Nov 2017 | 24 Jan 2026 |
| Tested up to | WP 7.1 | WP 6.9.7 |
| Requires PHP | 5.6.20 | 8.0 |
Install figures are rounded by WordPress.org to one significant digit, so a gap smaller than a band step is not a difference. Nothing here ranks the two plugins or recommends either, and no link on this page earns anything.
Why this page is not in search results
There are roughly 1.8 billion possible pairs of WordPress plugins. Generating them would be scaled content abuse, so this registry does not: a comparison renders for anyone who asks for it, and is offered to search engines only once 25 different people have asked for that same pair within 60 days. This one has been requested by 0. Until it crosses, the page works normally but stays out of the index.
Records: Host Header Injection Fix · Registration Email Blocker