It's a common misconception that sending something "from your email address" requires any degree of accessing your email account. It does not. The visible "From

It's a common misconception that sending something "from your email address" requires any degree of accessing your email account. It does not. The visible "From" is transmitted as a regular header and you are free to modify it at will, much like the Subject line. Some low-level clients make this easier (say, Mutt) but most clients allow you to do so. For instance, all desktop and mobile apps, such as Outlook, Thunderbird and Apple Mail have an Accounts setting screen where you can change your "sender" email address. You can write anything you want in that field. Online services, such as GMail, require you to have access to the addresses you wish to use as "sender", but they are the exception. Anybody can still use your GMail address as sender in their emails. (Anti-SPAM features such as SPF notwithstanding.)