Header name |
Protocol |
|
| Date | Message date and time | |
| From | Mailbox of message author | |
| Sender | Mailbox of message sender | |
| Reply-To | Mailbox for replies to message | |
| To | Primary recipient mailbox | |
| Cc | Carbon-copy recipient mailbox | |
| Bcc | Blind-carbon-copy recipient mailbox | |
| Message-ID | Message identifier | |
| In-Reply-To | Identify replied-to message(s) | |
| References | Related message identifier(s) | |
| Subject | Topic of message | |
| Comments | Additional comments about the message | |
| Keywords | Message key words and/or phrases | |
| Resent-Date | Date and time message is resent | |
| Resent-From | Mailbox of person for whom message is resent | |
| Resent-Sender | Mailbox of person who actually resends the message | |
| Resent-To | Mailbox to which message is resent | |
| Resent-Cc | Mailbox(es) to which message is cc'ed on resend | |
| Resent-Bcc | Mailbox(es) to which message is bcc'ed on resend | |
| Resent-Reply-To | Resent reply-to | |
| Resent-Message-ID | Message identifier for resent message | |
| Return-Path | Message return path | |
| Received | Mail transfer trace information | |
| Encrypted | Message encryption information | |
| Disposition-Notification-To | Mailbox for sending disposition notification | |
| Disposition-Notification-Options | Disposition notification options | |
| Accept-Language | Language(s) for auto-responses | |
| Original-Message-ID | Original message identifier | |
| PICS-Label | PICS rating label | |
| Encoding | Message encoding and other information | |
| List-Archive | URL of mailing list archive | |
| List-Help | URL for mailing list information | |
| List-ID | Mailing list identifier | |
| List-Owner | URL for mailing list owner's mailbox | |
| List-Post | URL for mailing list posting | |
| List-Subscribe | URL for mailing list subscription | |
| List-Unsubscribe | URL for mailing list unsubscription | |
| Message-Context | Type or context of message | |
| DL-Expansion-History | Trace of distribution lists passed | |
| Alternate-Recipient | Controls forwarding to alternate recipients | |
| Original-Encoded-Information-Types | Body part types in message | |
| Content-Return | Return content on non-delivery? | |
| Generate-Delivery-Report | Request delivery report generation | |
| Prevent-NonDelivery-Report | Non-delivery report required? | |
| Obsoletes | Reference message to be replaced | |
| Supersedes | Reference message to be replaced | |
| Content-Identifier | Message content identifier | |
| Delivery-Date | Message delivery time | |
| Expiry-Date | Message expiry time | |
| Expires | Message expiry time | |
| Reply-By | Time by which a reply is requested | |
| Importance | Message importance | |
| Incomplete-Copy | Body parts are missing. | |
| Priority | Message priority | |
| Sensitivity | Message content sensitivity | |
| Language | X.400 message content lenguage | |
| Conversion | Conversion allowed? | |
| Conversion-With-Loss | Lossy conversion allowed? | |
| Message-Type | Message type: delivery report? | |
| Autosubmitted | Automatically submitted indicator | |
| Autoforwarded | Automatically forwarded indicator | |
| Discarded-X400-IPMS-Extensions | X.400 IPM extensions discarded | |
| Discarded-X400-MTS-Extensions | X.400 MTS extensions discarded | |
| Disclose-Recipients | Disclose names of other recipients? | |
| Deferred-Delivery | Deferred delivery information | |
| Latest-Delivery-Time | Latest delivery time requested | |
| Originator-Return-Address | Originator return address | |
| X400-Content-Identifier | Message content identifier | |
| X400-Content-Return | Return content on non-delivery? | |
| X400-Content-Type | X400 content type | |
| X400-MTS-Identifier | X400 MTS-Identifier | |
| X400-Originator | X400 Originator | |
| X400-Received | X400 Received | |
| X400-Recipients | X400 Recipients | |
| X400-Trace | X400 Trace |