Title: PHP-Error Warning
Last modified: October 16, 2025

---

# PHP-Error Warning

 *  Resolved [nexxtpress](https://wordpress.org/support/users/nexxtpress/)
 * (@nexxtpress)
 * [7 months, 2 weeks ago](https://wordpress.org/support/topic/php-error-warning-17/)
 * I am getting a repeating error in my logfile. Not sure if that is significant?
   `[
   16-Oct-2025 15:47:00 UTC] PHP Warning: gethostbyaddr(): Address is not a valid
   IPv4 or IPv6 address in /var/www/wordpress/wp-content/plugins/activitypub/includes/
   class-mailer.php on line 89

Viewing 1 replies (of 1 total)

 *  Plugin Author [Matthias Pfefferle](https://wordpress.org/support/users/pfefferle/)
 * (@pfefferle)
 * [7 months, 1 week ago](https://wordpress.org/support/topic/php-error-warning-17/#post-18687954)
 * Hey [@nexxtpress](https://wordpress.org/support/users/nexxtpress/) 👋
 * it will be fixed in the next version: [https://github.com/Automattic/wordpress-activitypub/pull/2342](https://github.com/Automattic/wordpress-activitypub/pull/2342)
 * Thanks for reporting!

Viewing 1 replies (of 1 total)

The topic ‘PHP-Error Warning’ is closed to new replies.

 * ![](https://ps.w.org/activitypub/assets/icon.svg?rev=3325036)
 * [ActivityPub](https://wordpress.org/plugins/activitypub/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/activitypub/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/activitypub/)
 * [Active Topics](https://wordpress.org/support/plugin/activitypub/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/activitypub/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/activitypub/reviews/)

## Tags

 * [PHP Warning](https://wordpress.org/support/topic-tag/php-warning/)

 * 1 reply
 * 2 participants
 * Last reply from: [Matthias Pfefferle](https://wordpress.org/support/users/pfefferle/)
 * Last activity: [7 months, 1 week ago](https://wordpress.org/support/topic/php-error-warning-17/#post-18687954)
 * Status: resolved