Supplementary Information for Messages
In addition to its fields, a message also carries other information.
Address Information
Before sending a message, a program adds these two pieces of address information to the message:
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The subject (also called the send subject) of a message directs it to its destinations. |
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In contrast, the optional reply subject of a message is a return address, to which recipients can send reply messages. |
Certified Delivery Information
Certified message delivery (CM) features add more information to a message:
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Before sending a message using a certified delivery (CM) transport, a program can set a time limit for certified delivery guarantees on the message. |
When a program sends a message using a CM transport, the transport automatically labels the outbound message with two additional pieces of CM information:
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The sender name—that is, the correspondent name of the CM transport. |
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The sequence number of the message. |
See Also
Labeled Messages