The usereplyto keyword controls the mapping of the Reply-to: header. The default is usereplyto 0, which means to use the channel default behavior (which varies from channel to channel). TABLE 3-6 indicates the mapping specifications for the Reply-to: header:
TABLE 3-6 Reply-to: Header Mapping Options
Value
|
Action
|
|---|
|
-1
|
Never map Reply-to: addresses to anything.
|
|
0
|
Use the channel default mapping of Reply-to: addresses; (varies from channel to channel). This is the default.
|
|
1
|
Map Reply-to: to From: if no usable From: address exists.
|
|
2
|
If there is a usable Reply-to: address, then map it to From:; otherwise, fall back to the From: address.
|