Re: [Emailcore] Ticket #14: G.7.8. Review different size limits

[John C Klensin <[e-mail]>]

--On Saturday, July 17, 2021 19:06 -0700 Ned Freed
<[e-mail]> wrote:

>> Actually, given an 8BITMIME message and a nexthop SMTP server
>> that does not support 8BITMIME, Postfix will in fact (by
>> default) do on the fly MIME quotable-printable encoding.
> 
>>     http://www.postfix.org/postconf.5.html#disable_mime_outpu
>>     t_conversion
> 
> Our MTA defaults to this as well. But it's trivial to switch
> off, and I have no way of knowing how many sites do so.

Completely out of curiosity, as the amount of traffic that does
not use Latin script increases (IMO, quoted-printable is far
less useful when most of the characters are outside the ASCII
repertoire), do either of you do the fairly minimal analysis
needed to decide when Base64 would be more compact and no less
useful?  Or provide a switch s.t. if encoding is to be done,
Base64 might be preferred by the configuration instead of
quoted-printable?   It seems like that might be worthwhile if
one were carrying a significant amount of non-Latin-script,
traffic.

of course, none of this has anything to do with changes that
might be needed in rfc5321bis, AFAICT.

best,
   john