| Value | Meaning |
|---|---|
| Sender0 | Represents the addresses in the Sender header. |
| From1 | Represents the addresses in the From header. |
| ReplyTo2 | Represents the addresses in the Reply-To header. |
| To3 | Represents the recipients in the To header. |
| Cc4 | Represents the recipients in the Cc header. |
| Bcc5 | Represents the recipients in the Bcc header. |
An address type.