my ($email) = PublicInbox::Address::emails($from);
my ($name) = PublicInbox::Address::names($from);
if (!defined($name) || !defined($email)) {
$sender = $mime->header('Sender');
my ($email) = PublicInbox::Address::emails($from);
my ($name) = PublicInbox::Address::names($from);
if (!defined($name) || !defined($email)) {
$sender = $mime->header('Sender');