# org.civicrm.flexmailer

FlexMailer (`org.civicrm.flexmailer`) is an email delivery engine for CiviCRM v4.7+.  It replaces the internal guts of CiviMail.  It is a
drop-in replacement which enables *other* extensions to provide richer email features.

* [Introduction](docs/index.md)
* [Installation](docs/install.md)
* [Development](docs/develop/index.md)
    * [CheckSendableEvent](docs/develop/CheckSendableEvent.md)
    * [WalkBatchesEvent](docs/develop/WalkBatchesEvent.md)
    * [ComposeBatchEvent](docs/develop/ComposeBatchEvent.md)
    * [SendBatchEvent](docs/develop/SendBatchEvent.md)