How many emails will an iPhone hold?

Answer 1

The system is limited by the memory size (8, 16 or 32 GB as of this writing). It also depends on the size of the messages and attachments and on the free space available (movies, pictures, songs, apps). If your iPhone isn't full of other things, it can hold thousands of emails.

Answer 2

You can have unlimited emails but the more email accounts you have on the phone the slower it will be to check all the mail boxes

Answer 3

I entered 20 accounts then stopped.

Answer 4

As many as the OS and memory can handle.

Answer 5

Yes, you can set up multiple accounts.