I can't compose and send e-mails. it defaults, wrong address?not

You can always restore it to brand new.
You need a computer with iTunes and the charghing usb cable.
Before restoring make sure that the Find my iPhone app is off, otherwise after restoring it will give you the very same wrong email.
Once that is off, connect the ipad to the computer and click restore.
Once restore is complete, at very end you will be prompt with 2 questions:
1. Set iPad as brand new
2. Restore from (your name) back up.

At this iem you can choose either one, because Find my iPhone is off. And now you can change the email address.
It is your best option since it is way too difficult without restoring it.

The inability to send, reply, or forward emails could be from a program that was installed on your computer that is now preventing the Yahoo! Mail Rich Text toolbar from launching properly. Try switching from "Rich Text" compose mode to "Plain Text" as a work around:

1. Sign in to your Yahoo! Mail account.
2. Click the New button to start a new email.
3. To the far right of the "Subject" line click the "Plain Text link.
4. Compose and send your email.

To make "Plain Text" your default when replying or forwarding, do this:

1. Sign in to your Yahoo! Mail account.
2. Click "Options," then select "More Options" from the pull down arrow in the upper right corner of your Mail page.
3. Select "General" from the list of options on the left side of the page.
4. Check the box next to; When replying & forwarding Mark original message with > (plain text only).
5. Click the "Save Changes" button in the upper left corner.

Do not post your e-mail address and password online for any reason!

It sounds like you might have a virus on your computer. Do a complete anti-viris and malware scan of your computer.

If you use Mail classic you will have "compose mail" to write your mails,
If you use All-new mail there will be a "new" button at the left hand side click on and start composing.
In all-new mail if your press the "n" button for a while on your key board it will directly take you to the composing mail page.
Once you are done you can press"s" button on key board to send the mails through.

Good luck ! if you think your problem solved don't forget to rate

In Firefox 3, by default, when user click on an email address or a URL link location that starts with mailto: protocol, the default email client, such as Microsoft Outlook, Outlook Express or Windows Mail will be opened to allow user to compose and send email to the specific recipient?s mail address. If you prefer to use web based Yahoo! Mail as your default email client, and want to let Yahoo! Mail handles all mailto: protocol, so that the automatic e-mail message composing and email sending will be done via Yahoo! webmail interface, Firefox 3 provides a very easy way to associate the mailto: link with Yahoo! mail web-based interface, in fact, it?s a built-in integration. Go to Tools -> Options. Click on Applications tab icon. Locate and click to highlight mailto Content Type, and at the corresponding drop down box of Action, select Use Yahoo! Mail. Click OK. After change, whenever a mailto: link is clicked, the email address will be sent to Yahoo! Mail account Compose web interface, with recipient automatically set at the clicked e-mail address. Of course, user has to enter user name and password credentials first if he or she hasn?t already logged in. Note: It?s also possible to set Gmail as the default mailto: handler at Firefox 3 best of luck Mel

Go to http://mail.yahoo.com and log in with your Yahoo ID. From there, in the top left corner of the screen, you will see either "compose" (if you're using mail classic) or "new" (if you're using new Yahoo mail). In the "To:" field, type the email address of the person you want to send a message to. In the "Subject:" field, type a brief subject about the email. Below that is a large box which allows you to type the entire message of the email. Once you have written what you want to say, click the "Send" button (should be near the top left, above the "To:" field).

Log in to the E-MAIL service that you have subscribed to.. Click on compose/send mail.. Type in the address you want to send mail to.. write the subject in the subject field.. Type in the message.. Click send.

Check your system. It may be infecte with a virus. If not then try to HTML Version (Old Version) of Yahoo mail.

Hi go to the compose section of an email and then attach the picture with the mail and provide the mail id in to field and send that picture by pressing the send button.
Thanks!

To fix the responding issue, you need to tell your iphone which account is the default account for sending your emails.

touch settings, then mail, and at the bottom of that page in the sending section it asks which account is your default.

The iphone will always use this accoutn to send emails if you start an email outside of the mail program, like by clicking an email in your contacts list or on a webpage.

Now if your in another POP account in the mail program and you click compose message it should be sent from that account.

Hope this helps :)