邮件正文会被当成附件，导致textHTML为空

[halay]

[halay]

$attachmentId = $partStructure->ifid
? trim($partStructure->id, " <>")
: (isset($params['filename']) || isset($params['name']) ? mt_rand() . mt_rand() : null);
// ignore contentId on body when mail isn't multipart (barbushin/php-imap#71)
if (!$partNum && TYPETEXT === $partStructure->type)
{
$attachmentId = null;
}