unable to download files

Remove your email account and set it up again

Make sure that all of your emails are there or make sure that your email is saved somewhere other than your device. On your device, go to Settings > Mail, then tap Accounts. Tap the email account that you want to remove. Tap Delete Account.

If you can't receive email on your iPhone, iPad, or iPod touch ...

Which email account are you referring to? Google, iCloud, AOL, Exchange, Outlook, Yahoo or any Other (Refer to the pic )below

1. Is this your corporate iPhone? Then please contact the system administrator of your corporate
2. If it is your personal device, in that case, do you have any profile installed by your corporate/organisation/enterprise/School Management?
   1. Erase the profile added by you If you have installed a profile on your own --> Install or remove configuration profiles on iPhone - Apple ...
   2. Or please contact the system administrator of the organisation who provided the profile to you

While most PDFs can be viewed directly within your iPhone's Mail app, there are some occasions where you might encounter a PDF attachment that requires a dedicated PDF reader app like Adobe Acrobat Reader to open it properly.

There are two main reasons why some PDF attachments require a dedicated PDF reader app:

1. Complexity: The PDF might contain advanced features or formatting that the Mail app's built-in viewer cannot handle. This could include things like:

• • Embedded fonts: The PDF may use special fonts that are not installed on your iPhone. A dedicated PDF reader app will have a wider range of fonts pre-installed, or it may be able to temporarily embed the fonts needed to display the PDF correctly.
  • Complex layouts: Some PDFs have very complex layouts, with multiple columns, layers, or overlapping elements. The Mail app's built-in viewer may struggle to render these layouts accurately, leading to a jumbled or unreadable mess.
  • Interactive elements: Some PDFs contain interactive elements, such as buttons, forms, or embedded videos.The Mail app's built-in viewer is unlikely to be able to handle these elements, while a dedicated PDF reader app may be able to display them and allow you to interact with them.

1. Security: The PDF might be password-protected or encrypted, requiring a dedicated app to unlock and view the content. The Mail app's built-in viewer will not be able to decrypt these PDFs.

In addition to these two main reasons, there may be other cases where a dedicated PDF reader app offers a better viewing experience. For example, dedicated PDF reader apps often have more features for navigating and searching through PDFs, such as bookmarks, thumbnails, and text search. They may also allow you to annotate PDFs with highlights,comments, and drawings.

You may be able to tap on the pdf attachment to open it, and then choose to save it to the Books app, where it will appear in the Library.

How to: View, save, or delete email attachments in Mail on Mac - Apple Support