// Line Format
// email,
// name <email>,
// "name" <email>,

// Group 2 will have the name if available
// Group 3 will have the email

def raw  = $/
aaa@mail.com,
bbb.aaa@mail.com,
"aaa bbb c." <ccc@mail.abc.uy>,
aaaa áááá <aaa.bbb@gmail.com>,
aaa@aaaa-aaaa.cl,
aaa bbb <aaa.bbb.H@gmail.com>,
aaa.bbb.ccc@gmail.com,
aaa.bbb@hotmail.com,
aaa bbb ccc ddd <aaaaa@bbbbb.cl>,
aaa bbb <aaa_bbb@ccc.com>
/$

import java.util.regex.Matcher;
import java.util.regex.Pattern;

final String regex = "(\"?([a-zÀ-úÀ-ÿ\\.\\s]*)\"?\\s\\<)?((([a-z0-9-_]+\\.)*[a-z0-9-_]+)@(([a-z0-9-_]+\\.)*[a-z0-9-_]+)\\.[A-Z]{2,})(>?)(,?)*(\\s)*";

final Pattern pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE);
final Matcher matcher = pattern.matcher(raw);

while (matcher.find()) {
  System.out.println("Full match: " + matcher.group(0));
  for (int i = 1; i <= matcher.groupCount(); i++) {
    System.out.println("Group " + i + ": " + matcher.group(i));
  }
}