on my ipad when I set up email accounts, i can enter multiple addresses in the Email field, separated by a comma, which is located on the keyboard far right, second symbol screen.
On my iphone 5 there's NO COMMA that I can find on any of the three Keyboard screens when you're in the Email field.
What's up with that?
I'm running ios 6 on both devices
Beth, I ran into the same issue.
What I did was this:
(1) Go into the Note app and enter your comma-delimited list of email addresses.
(2) Copy the list and paste it into the Mail settings where you tried to enter it.
It works fine that way.
Note however that if you are using the default Gmail settings there isn't a separate field for your email address and username - they are the same. So you will get an error when you try to save. However, if you use the manual setup where there are separate fields for username and email address this will work.
You can even add the extra email addresses to another non-Gmail account and when you try to send you can select the alternate email address.