The post by email issue has been resolved. We are still having some issues with adding media, and developers are looking into that issue. In the meantime, we recommend that you upload media using the Dashboard Add Media option and if drag and drop isn't working, manually find the image file on your hard drive and upload that way.
However, emotola, the post by email address should be kept safe, much like a password. If someone else has the address, they can post to your blog.
Even though email addresses should be redacted on the forums, for security reasons I have regenerated your post by email address. You can view the new email address at https://motolamemories.wordpress.com/wp-admin/index.php?page=my-blogs