My iPhone and computer both use the same login information. My computer sends and downloads mail correctly. For the past couple of months my iPhone has been saying: "The user name or password for "Verizon" is incorrect. Verizon is how I identify my verizon.net account.
I have tried deleting the acccount, rebooting, re-entering the account and re-booting again. This has not worked. I don't want to change my password on the iPhone because thart might screw up the computer, which is working.
This used to work but stopped working at a time when I had not recenly updated ANYTHING. Therefore, the problem does not seem to be in my iPhone or my computer.