field1 = doc['EMAIL_FROM'].value;
field2 = doc['SENDER_EMAIL'].value;

field1_at_index = field1.indexOf('@');
field1_domain = field1.substring(field1_at_index + 1, len(field1))

field2_at_index = field2.indexOf('@');
field2_domain = field2.substring(field2_at_index + 1, len(field2))


if (field2_domain == field1_domain) {
    return true;
}

return false;