Re: [Emacs-diffs] emacs-26 0d8bae5: Fix capitalization of mail headers

[Paul Eggert]

> From: Eli Zaretskii <address@hidden>
> To: Stefan Monnier <address@hidden>
> ...
> Cc: address@hidden
> ...
> I see them all the time.  I guess it depends on your MUA.

It's typically "Cc" and "Bcc" in email contexts, because of Internet RFC 5322 
and its predecessors. Although these standards are case-insensitive, the usual 
spelling in email headers is "Cc:" etc.

The abbreviation "cc" was not originally an initialism. It meant two or more 
copies, from the Latin abbreviations "c" for "copia" and "cc" for "copiae". By 
the same tradition "pp" (for "paginae") is still widely used in English. 
Although "cc" has also come to mean "carbon copy", that's a reuse of the Latin. 
In traditional English-language business correspondence over the years I have 
seen "cc" most often, though I have also seen "CC" and "Cc" quite a bit.

Since "CC" also stands for "CC Mode", "Creative Commons" and suchlike, it's 
useful for Emacs to stick with the RFC 5322 capitalization to distinguish email 
Cc from the other CC usages. I installed the attached into master to try to be 
more consistent about this.

0001-Use-Cc-for-email-copies-as-per-RFC-5322.txt
Description: Text document