- addresses are separated by a comma.
- Cc:
- Bcc:
- Subject:
- Date:
- Reply-To:
- Organization:
- Message-ID:
- Received:
- X- anything:
This is a list of email addresses that will receive "carbon copies" of the message. Multiple recipient addresses are separated by a comma.
This is a list of email addresses that will receive "carbon copies" of the message. The key difference between a "Cc:" and a "Bcc:" is that the addresses listed in a "Bcc:" will not appear in the header of the mail messages delivered to any recipient. It's a way of alerting recipients that you've sent copies of the message to other people without telling them who those others are. Multiple recipient addresses are separated by a comma.
Describes the content of the mail in a few words.
Supplies the date and time the mail was sent.
Specifies the address the sender wants the recipient's reply directed to. This may be useful if you have several accounts, but want to receive the bulk of mail only on the one you use most frequently. This field is optional.
The organization that owns the machine from which the mail originates. If your machine is owned by you privately, either leave this out, or insert "private" or some complete nonsense. This field is not described by any RFC and is completely optional. Some mail programs support it directly, many don't.
A string generated by the mail transport on the originating system. It uniquely identifies this message.
Every site that processes your mail (including the machines of sender and recipient) inserts such a field into the header, giving its site name, a message ID, time and date it received the message, which site it is from, and which transport software was used. These lines allow you to trace which route the message took, and you can complain to the person responsible if something went wrong.
No mail-related programs should complain about any header that starts with X- . It is used to implement additional features that have not yet made it into an RFC, or never will. For example, there was once a very large Linux mailing list server that allowed you to specify which channel you wanted the mail to go to by adding the string X-Mn-Key: followed by the channel name.
Notes
It is customary to append a signature or .sig to a mail message, usually containing information on the author along with a joke or a motto. It is offset from the mail message by a line containing "-- " followed by a space.
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