Documents 6 is the best file manager, music player and downloader for iPhone and iPad. Download it for free, if you haven’t done so yet.
Downloading your email attachments is pretty easy, although it's not very straightforward. There's simply no Downloads folder on iPhone and iPad, everything is handled by the apps.
However, Documents closes this gap and lets you easily download PDF, png, Word and xls attachments and store them in one place.
How to save an email attachment from Apple Mail to Documents:
- Open the email in the iPhone or iPad Mail app
- Tap and hold on the attachment
- Select Copy to Documents
A copy of the file will be saved in Documents and opened for preview. From there, you can easily move it to Dropbox, Google Drive, iCloud or elsewhere.