<issue_start><issue_comment>Title: Import - Validate Email
username_0: Use simplified RFC 5322 regex 
```
^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$
```

source http://www.regular-expressions.info/email.html
<issue_comment>username_0: nvm, that regex breaks XML schema :disappointed: 
trying this regex instead
```
^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$
```
<issue_comment>username_0: opting for an even simpler regex `[^@]+@[^\.]+\..+`<issue_closed>