* The POSIX module of PHP needs to be activated (e.g. [RHEL, CentOS](http://www.bigsoft.co.uk/blog/index.php/2014/12/08/posix-php-commands-not-working-under-centos-7) have disabled it)
* Some form of email server or email gateway such that PHP mail() works.
If you cannot set up your own email server, you can use the [phpmailer](https://github.com/friendica/friendica-addons/tree/develop/phpmailer) addon and use a remote SMTP server.
* The POSIX module of PHP needs to be activated (e.g. [RHEL, CentOS](http://www.bigsoft.co.uk/blog/index.php/2014/12/08/posix-php-commands-not-working-under-centos-7) have disabled it)
* Some form of email server or email gateway such that PHP mail() works.
If you cannot set up your own email server, you can use the [phpmailer](https://github.com/friendica/friendica-addons/tree/develop/phpmailer) addon and use a remote SMTP server.