You can unsubscribe from promotional emails anytime if you don't want to receive them anymore.

unsubscribe 由前缀 un-（表示"相反、取消"）和动词 subscribe（订阅）组成，字面意思是"取消订阅"。subscribe 本身由 sub-（"在...之下"）和 scribe（"写"）构成，原指"在文件下方签名表示同意"，引申为"订阅"。 unsubscribe 指主动取消之前订阅的邮件、服务等，通常用于电子邮件的退订功能。