When sending photos and links from your iPhone, the iPhone will always use your default email address.
Your default address is determined in your Mail settings. To change your default account, go to
Settings -> Mail, Contacts, Calendar -> Default Account
A different email account can also be selected when composing a new message. Click here for instructions on how to change the From address when sending iOS mail.
You may not want to see the little preview of text messages that turn up on your home screen when a new text (SMS) message comes in. To turn this off, head to your iPhone settings and go to:
iOS 7/8 UPDATE: Turn off text message, SMS and iMessage previews in alerts, banners and Notification Center with the following setting:
Settings -> Notifications -> Messages -> Show Previews -> OFF (gray switch, NOT green)
Turning off 'Show Previews' will disable the text message preview on your iPhone.
Unfortunately, at this point, there isn't.
For the time being, you're left with one of two options, each which delete only one message at a time:
1) tap the EDIT button then use the minus+confirm DELETE
2) swipe your finger across the subject/teaser of the message you want to erase and confirm DELETE
Hopefully a multiple delete or delete all feature is coming in a firmware update to the iPhone.
UPDATE: Click here for instructions on how to forward a text / SMS / iMessage on iPhone.
For iPhones using firmware 3.0 or higher, forwarding of SMS messages is a built in feature. To forward a text message, simply
1) view the SMS text message conversation containing the message you'd like to forward
2) tap EDIT at the top of the screen
3) check off the message(s) you'd like to forward
4) tap FORWARD at the bottom right of the screen
UPDATE: Send SMS or MMS messages to multiple recipients by adding them all to the "To:" line when creating a new message. Phone numbers can be entered and separated using the "return" key. Multiple recipients can be added from your Contacts using the "+" button.
