[Users] Headers

[Felipe T. Dorado]

Hello there!

Have been following this list and reading you for about 3 years now. Thank
you all.

And have also happily been using Sylpheed/Claws for the past 10 years
now  : )  'cause I found it in aptitude/synaptic and not for reviews such
as the link below [1].

Ctrl+U gives us the source of the present message. 
Where can I find the exact meaning of all the klutches (?) listed in the
header of the source? 
These:

AF:
NF:
PS:
SRH:
SFN:
DSR:
MID:
CFG:
PT:
S:
RQ:
SSV:
NSV:
SSH:
R:
MAID:
X-Claws-Privacy-System:
X-Claws-Sign:
SCF:
RMID:
X-Claws-Auto-Wrapping:
X-Claws-Auto-Indent:
X-Claws-End-Special-Headers: 

Date: 
From: 
To: 
Bcc: 
Subject: 
Message-ID:
In-Reply-To:
References: 
X-Mailer: Claws Mail 3.8.1 (GTK+ 2.24.10; i486-pc-linux-gnu)
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-15
Content-Transfer-Encoding: quoted-printable

Thank you.

Felipe  : )


[1]
http://www.techrepublic.com/blog/linux-and-open-source/claws-mail-what-an-email-client-should-be-like/