I do a fair amount of TF2 trading on steam through sites like backpack.tf. Every time I want to send or confirm trade offers steam sends me an email which I have to click in order to confirm the trade. This is annoying because I have to do it a lot. Is there any way to disable this or configure it such that I don't have to do an email confirmation every time?
Visit your Inventory page.
Click More > Inventory Privacy Settings
Set Confirmation of Trades to Disabled and hit Save Changes
Note, by disabling email confirmations, you are forfeiting your rights to having your items recovered if your account is compromised. Make sure you have a strong, unique password on both your Steam account and email account.
Although @Keavon cleared in some small steps, if you want to see the detailed guide here is a link I found. How to activate / deactivate email for Steam Trade / Steam Offers