legacy/src/main/java/thredds/catalog/dl/ADNWriter.java
protected boolean emailOK(ThreddsMetadata.Source p) {
    String email = p.getEmail();
    return email.indexOf('@') >= 0; // should really do a regexp
  }
protected boolean emailOK(ThreddsMetadata.Source p) {
    String email = p.getEmail();
    return email.indexOf('@') >= 0; // should really do a regexp
  }
check its an acceptable form of email