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command line mail with accent

Send characters like é è à in a command line mail

I run CentOS 6, and made my first try with the "bsd-mailx" "mail" command line.

#!/bin/bash
export LANG=fr_FR.UTF-8
export LC_ALL=fr_FR.UTF-8
echo "Tâches du $( date +"%a %d %b %Y" -d "+1days" )" | mail -s "$( date +"%a %d %b %Y" -d "+1days" )" toto@rktmb.org

When current month is "August", "Août" in French, it is just the big mess: characters are not encoded!

I tried with 

mail -a "Content-Type: text/plain; charset=UTF-8"

But it displayed right for the body, the subject was screwed yet

Then I switched to "mailx":

# yum remove bsd-mailx
# yum install mailx


I tried with 

mail -S sendcharsets=utf-8,iso-8859-1

And this works!

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