logstash/logstash — pull request #365 by smat (2013-02-16 23:57:43+00:00)
Title: Email output plugin should not use authentication by default for SMTP 

This commit should resolve [LOGSTASH-559](https://logstash.jira.com/browse/LOGSTASH-559)

Since there is no way to set a nil value in the configuration, you can
not use the email plugin with an SMTP-server that does not use
authentication.