On 29/01/2016 23:30, Brandon Long wrote:
I would be remiss if I didn't mention that one of my colleague's here
at Google thinks this is all silly, and we should instead figure out
how to not base64 encode the messages in the first place, but I think
that's a higher barrier than this.
The problem is that that requires ALL mail software to support that,
otherwise you need to have recoding of messages by MTAs, which is
problematic (eg for DKIM). If you compress messages, then that is done
on a hop-by-hop basis, and the original message is unaltered.
I know we don't support the 8BITMIME extension in our MTA because I
don't want to faff around with recoding messages for a small gain, but
we'd probably do a message-based compression extension (might have to
think hard about whether to implement stream based compression, and
would probably decide it's not worth it).
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