I want to send email in a group or team. when i selected group or team and click email link then all email fill in the "To" and fill the subject and description and click on send.Then send the mail to complete group
Here is a custom workflow which can help with this: https://crm2011internalemail.codeplex.com/
Outside of this, I do not believe you can simply type in a team name to send the email to everyone at once.