Title: WP warning
Last modified: August 21, 2016

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# WP warning

 *  [seanimler](https://wordpress.org/support/users/seanimler/)
 * (@seanimler)
 * [12 years, 10 months ago](https://wordpress.org/support/topic/wp-warning/)
 * Upon activating the plugin, I received the following:
    The plugin generated 510
   characters of unexpected output during activation. If you notice “headers already
   sent” messages, problems with syndication feeds or other issues, try deactivating
   or removing this plugin.
 * ??
 * [http://wordpress.org/plugins/mail-subscribe-list/](http://wordpress.org/plugins/mail-subscribe-list/)

The topic ‘WP warning’ is closed to new replies.

 * ![](https://ps.w.org/mail-subscribe-list/assets/icon-128x128.png?rev=1158481)
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 * 0 replies
 * 1 participant
 * Last reply from: [seanimler](https://wordpress.org/support/users/seanimler/)
 * Last activity: [12 years, 10 months ago](https://wordpress.org/support/topic/wp-warning/)
 * Status: not resolved