ITPEC FE Morning October 2019 Question 36

Bcc — the blind carbon copy field is removed, so recipients cannot see who else received the message.

SMTP delivers mail by the envelope recipients (RCPT TO), not by the header fields. When the message is submitted, the Bcc addresses are added to the envelope and the Bcc line is deleted from the header, so the copy that travels and arrives no longer shows them.

Answer (a)

Why not others:

• •(b) Date — set when the message is composed and kept unchanged all the way to the recipient
• •(c) Received — the opposite of removed: each mail server that relays the message adds a new Received line, recording the route
• •(d) X-Mailer — an optional field naming the sending mail program; it travels with the message like any other header

Key rule: In e-mail, the envelope decides where a message goes and the header is what the reader sees; Bcc addresses go into the envelope only, and relays add Received lines rather than remove fields.

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