That sometimes happens to me when I send to @yahoo.com email accounts. For registration emails on BP especially
This isn’t really something that’s specific to the wpMandrill plugin. There are a number of reasons mail being sent might end up in spam folders. We’d recommend starting here for more details about common reasons and things you can do to help prevent it: http://help.mandrill.com/entries/23317558-Why-are-my-emails-going-into-recipients-spam-folders-
If you’re seeing other issues, you can also submit a request directly to our support team by clicking the ‘Help’ link in the footer when you’re logged in to your account.
