laravel/laravel — pull request #2021 by ipalaus (2013-05-27 04:36:10+00:00)
Title: The default sendmail path must contain '-bs' or '-t' flags.

This is required, if not Swiftmailer will throw the next exception:

```
[Swift_TransportException]
Unsupported sendmail command flags [/usr/sbin/sendmail]. Must be one
of "-bs" or "-t" but can include additional flags.
```