[sylpheed:37306] Re: Email standard for BCC behaviour

On Thu, 25 Jul 2024 04:49:02 -0700
Jeremy Cook <[email protected]> wrote:

> In interpreting this RFC, I would urge that principle to take priority,
> that is, BCC addresses should never be revealed to other recipients, even
> other recipients on the BCC line.

	In a quick test with Sylpheed no BCC: header was sent to any
recipient whether or not they were on the BCC list.

> As written, this is ambiguous, and seems to suggest that "other
> implementations" might actually keep the entire BCC line with all listed
> addresses. Which violates the principle that BCC addresses "are not to be
> revealed to other recipients of the message."

	When taken in context with the definition of BCC in RFC-2822 I
think it implies that the alternative is to completely suppress the BCC
header rather than generating separate messages.

-- 
Steve O'Hara-Smith <[email protected]>