@ -807,7 +807,7 @@ class Mail_mimePart
// Structured header (make sure addr-spec inside is not encoded)
if (!empty($separator)) {
// Simple e-mail address regexp
$email_regexp = '(\S+|("[^\r\n"]+"))@\S+';
$email_regexp = '([^\s<]+|("[^\r\n"]+"))@\S+';
$parts = Mail_mimePart::_explodeQuotedString($separator, $value);
$value = '';