const char * dkim_getuser(
Retrieve the sending user associated with a message.
||dkim_getuser() can be called at any time after a handle
is initialized with a call to
||The sending user has not or could not be determined
from the message represented by this handle.
||A pointer to the sending user.
- This user is selected by finding the first "From" header field.
Note that it is
not guaranteed that this field was included in the set of fields fed
to the DKIM signature hashes (assuming it was signed), and in any
case its value may or may not have been valid at the time the message