Translations:Using regular expressions/144/en
From LimeSurvey Manual
If you want to validate one address per line, in a multiline long text field:
/^(((\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*(\r\n)?\n?)+)*)$/
If you want to validate one address per line, in a multiline long text field:
/^(((\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*(\r\n)?\n?)+)*)$/