If you want to change your e-mail address, then subscribe with the new address and unsubscribe with the old one.
If this occurs and you definitely don't want to receive any promotional mail from the company, be sure to unsubscribe (legally, all companies must offer this option in their emails).
However, you can quickly unsubscribe to the list if you would like.
No more e-mailing the website master to unsubscribe.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.