# Symfony Troubleshooting


## SwiftMailer

Symfony has a nice mailing system provided as a plug-and-play package, but sometime some tweaks are needed.

### Error Management

The swiftmailer do not fire exceptions, instead the `send(message)` method returns the number of successful recipients that can be zero (representing an issue). However, another sent method exists: `sent(message, failedRecipients)` which returns the list of failed email addresses.

Keep in mind that this errors are usually not catched during the normal code execution because the email sending is spooled.

### Checks

The swiftmailer checks the *from* address and the *to* address, comporting a failure if this addresses are fake. Keep this in mind when you do functional testing.