<s>
Cleancode	B-Protocol
eMail	I-Protocol
(	O
also	O
known	O
as	O
CleanCode	B-Protocol
Email	I-Protocol
or	O
simply	O
email	O
)	O
is	O
a	O
simple	O
command	O
line	O
software	O
utility	O
for	O
sending	O
SMTP	B-Protocol
email	O
.	O
</s>
<s>
It	O
is	O
portable	B-Architecture
enough	O
to	O
compile	O
and	O
run	O
under	O
Linux	B-Application
,	O
OS	B-Operating_System
X	I-Operating_System
,	O
BSD	B-Operating_System
,	O
Solaris	B-Application
,	O
Cygwin	B-Language
and	O
perhaps	O
other	O
Unix-like	O
operating	O
systems	O
.	O
</s>
<s>
Upon	O
installing	O
the	O
Cleancode	B-Protocol
eMail	I-Protocol
,	O
the	O
email	O
executable	O
binary	O
becomes	O
available	O
.	O
</s>
<s>
This	O
program	O
offers	O
features	O
for	O
sending	O
email	O
via	O
SMTP	B-Protocol
.	O
</s>
<s>
It	O
supports	O
SMTP	B-Protocol
AUTH	O
(	O
via	O
the	O
LOGIN	O
and	O
PLAIN	O
mechanisms	O
)	O
,	O
MIME	O
attachments	O
,	O
an	O
address	O
book	O
,	O
encryption	O
of	O
both	O
transport	O
(	O
via	O
TLS	O
)	O
and	O
message	O
(	O
via	O
PGP	O
)	O
,	O
and	O
digital	O
signatures	O
(	O
via	O
PGP	O
)	O
.	O
</s>
<s>
The	O
lack	O
of	O
modern	O
features	O
helps	O
Cleancode	B-Protocol
eMail	I-Protocol
stand	O
out	O
as	O
a	O
fast	O
,	O
efficient	O
and	O
helpful	O
tool	O
for	O
system	O
administrators	O
in	O
Unix-like	O
environments	O
,	O
as	O
that	O
was	O
its	O
intentional	O
purpose	O
when	O
first	O
developed	O
.	O
</s>
<s>
Cleancode	B-Protocol
eMail	I-Protocol
started	O
in	O
September	O
2001	O
and	O
is	O
currently	O
still	O
maintained	O
and	O
developed	O
by	O
the	O
original	O
author	O
,	O
Dean	O
Jones	O
.	O
</s>
