| mmse.bcc | Bcc | String | Blind carbon copy. |
| mmse.cc | Cc | String | Carbon copy. |
| mmse.content_location | Content-Location | String | Defines the location of the message. |
| mmse.content_type | Data | No value | Media content of the message. |
| mmse.date | Date | Date/Time stamp | Arrival timestamp of the message or sending timestamp. |
| mmse.delivery_report | Delivery-Report | Unsigned 8-bit integer | Whether a report of message delivery is wanted or not. |
| mmse.delivery_time.abs | Delivery-Time | Date/Time stamp | The time at which message delivery is desired. |
| mmse.delivery_time.rel | Delivery-Time | Time duration | The desired message delivery delay. |
| mmse.expiry.abs | Expiry | Date/Time stamp | Time when message expires and need not be delivered anymore. |
| mmse.expiry.rel | Expiry | Time duration | Delay before message expires and need not be delivered anymore. |
| mmse.ffheader | Free format (not encoded) header | String | Application header without corresponding encoding. |
| mmse.from | From | String | Address of the message sender. |
| mmse.message_class.id | Message-Class | Unsigned 8-bit integer | Of what category is the message. |
| mmse.message_class.str | Message-Class | String | Of what category is the message. |
| mmse.message_id | Message-Id | String | Unique identification of the message. |
| mmse.message_size | Message-Size | Unsigned 32-bit integer | The size of the message in octets. |
| mmse.message_type | Message-Type | Unsigned 8-bit integer | Specifies the transaction type. Effectively defines PDU. |
| mmse.mms_version | MMS-Version | String | Version of the protocol used. |
| mmse.priority | Priority | Unsigned 8-bit integer | Priority of the message. |
| mmse.read_reply | Read-Reply | Unsigned 8-bit integer | Whether a read report from every recipient is wanted. |
| mmse.report_allowed | Report-Allowed | Unsigned 8-bit integer | Sending of delivery report allowed or not. |
| mmse.response_status | Response-Status | Unsigned 8-bit integer | MMS-specific result of a message submission or retrieval. |
| mmse.response_text | Response-Text | String | Additional information on MMS-specific result. |
| mmse.sender_visibility | Sender-Visibility | Unsigned 8-bit integer | Disclose sender identity to receiver or not. |
| mmse.status | Status | Unsigned 8-bit integer | Current status of the message. |
| mmse.subject | Subject | String | Subject of the message. |
| mmse.to | To | String | Recipient(s) of the message. |
| mmse.transaction_id | Transaction-ID | String | A unique identifier for this transaction. Identifies request and corresponding response only. |