A dictionary that contains the names and values of the received header line. If the received header is invalid and contained one name multiple times, the first one is used and the rest is ignored.
Example
If the header lines looks like:
from sending.com (localMachine [127.0.0.1]) by test.net (Postfix)then the dictionary will contain two keys: "from" and "by" with the values "sending.com (localMachine [127.0.0.1])" and "test.net (Postfix)".
See Also
Received Class | OpenPop.Mime.Header Namespace