Hector Santos wrote:
Per x822, Sender: is OPTIONAL and not a network required
control header. It is more information than anything else.
We are not reading the same copy of 2822upd.
| If the originator of the message can be indicated by a
| single mailbox and the author and transmitter are identical,
| the "Sender:" field SHOULD NOT be used. Otherwise, both
| fields SHOULD appear.
|
| Note: The transmitter information is always present. The
| absence of the "Sender:" field is sometimes mistakenly
| taken to mean that the agent responsible for transmission
| of the message has not been specified. This absence merely
| means that the transmitter is identical to the author and
| is therefore not redundantly placed into the "Sender:"
| field.
Furthermore, not everyone supports Sender: unlike From:
which is a requirement.
A Sender is recommended (SHOULD) when it is not redundant,
and it is required (MUST) for more than one author:
| sender | 0* | 1 | MUST occur with multi-address from
Your claim that Sender is "OPTIONAL" per x822 is wrong.
Per x822, Sender: is OPTIONAL and not a network required
control header.
Two wrongs don't make this right. With wrong premises your
conclusions can be anything you wish.
Frank
_______________________________________________
NOTE WELL: This list operates according to
http://mipassoc.org/dkim/ietf-list-rules.html