Change the following sentence into passive voice.
She has sent an e-mail to Rashi.

The placement of the subject and object must be switched when switching from active to passive voice.
The primary verb in the passive voice is always the third form of the verb (past participle). This is true for all tenses.
Typically, the preposition "by" is used before the subject.
The statement that follows is an illustration of the present perfect tense. Subject + has/have + been + past participle + by object is the formula to change a present perfect sentence into passive voice.