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

From: Paul Eggert
Subject: Re: [Emacs-diffs] emacs-26 0d8bae5: Fix capitalization of mail headers
Date: Sun, 20 May 2018 11:08:20 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0

> 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.

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

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