Error when activating

We were unable to re-create the issue. What WordPress version are you on and what theme are you using?

WordPress 3.9.2
Theme:Twenty Twelve

all disabled plugins

We tested the plugins on multiple sites with WP3.9.2 and theme Twenty Twenty and we were still unable to re-create the issue.

Although we weren’t able to re-create the issue, we just published a new version of the plugin which might address your issue. Please try version 1.0.5.

https://www.ads-software.com/plugins/zendy-mailman/

Parse error: syntax error, unexpected end of file in …/wp-content/plugins/zendy-mailman/zendy-mailman.php on line 837

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If you want to grant us access to your site we can troubleshoot with you. Email us at [email protected]

We were able to re-create and fix the issue. Zendy Mailman 1.0.6 fixes the activation crash.