Plugins

Plugins are provided with Swift Mailer and can be used to extend the behavior of the library in ways that simple class inheritance would be more complex.

1. AntiFlood Plugin
   Many SMTP servers have limits on the number of messages that may be sent during any single SMTP connection. The AntiFlood plugin provides a way to stay within this limit while still managing a large number of emails.
2. Throttler Plugin
   If your SMTP server has restrictions in place to limit the rate at which you send emails, then your code will need to be aware of this rate-limiting. The Throttler plugin makes Swift Mailer run at a rate-limited speed.
3. Logger Plugin
   The Logger plugins helps with debugging during the process of sending. It can help to identify why an SMTP server is rejecting addresses, or any other hard-to-find problems that may arise.
4. Decorator Plugin
   Often there's a need to send the same message to multiple recipients, but with tiny variations such as the recipient's name being used inside the message body. The Decorator plugin aims to provide a solution for allowing these small differences.