<s>
Mail	O
(	O
formerly	O
Windows	B-Protocol
Mail	I-Protocol
)	O
is	O
an	O
email	B-Protocol
client	I-Protocol
developed	O
by	O
Microsoft	O
and	O
included	O
in	O
Windows	B-Application
Vista	I-Application
and	O
later	O
versions	O
of	O
Windows	O
.	O
</s>
<s>
It	O
is	O
available	O
as	O
the	O
successor	O
to	O
Outlook	B-Application
Express	I-Application
,	O
which	O
was	O
either	O
included	O
with	O
,	O
or	O
released	O
for	O
Internet	B-Protocol
Explorer	I-Protocol
3.0	I-Protocol
and	O
later	O
versions	O
of	O
Internet	B-Application
Explorer	I-Application
.	O
</s>
<s>
Windows	B-Protocol
Mail	I-Protocol
can	O
be	O
traced	O
to	O
a	O
pre-release	O
version	O
of	O
Outlook	B-Application
Express	I-Application
7	O
included	O
in	O
early	O
builds	O
of	O
Windows	B-Application
Vista	I-Application
(	O
then	O
known	O
by	O
its	O
codename	O
,	O
"	O
Longhorn	O
"	O
)	O
.	O
</s>
<s>
Outlook	B-Application
Express	I-Application
7	O
introduced	O
various	O
changes	O
to	O
the	O
user	O
interface	O
and	O
relied	O
on	O
WinFS	B-Application
for	O
the	O
management	O
and	O
storage	O
of	O
contacts	O
,	O
email	O
,	O
and	O
other	O
data	O
.	O
</s>
<s>
It	O
supported	O
Post	B-Protocol
Office	I-Protocol
Protocol	I-Protocol
(	O
POP	O
)	O
and	O
Internet	B-Protocol
Message	I-Protocol
Access	I-Protocol
Protocol	I-Protocol
(	O
IMAP	B-Protocol
)	O
email	O
protocols	O
,	O
but	O
no	O
longer	O
supported	O
Microsoft	O
's	O
proprietary	O
mail-over-HTTP	O
scheme	O
,	O
an	O
omission	O
inherited	O
by	O
Windows	B-Protocol
Mail	I-Protocol
.	O
</s>
<s>
IPv6	B-Protocol
is	O
fully	O
supported	O
.	O
</s>
<s>
Windows	B-Protocol
Mail	I-Protocol
was	O
formally	O
announced	O
on	O
September	O
16	O
,	O
2005	O
at	O
Channel	B-Application
9	I-Application
and	O
positioned	O
as	O
the	O
successor	O
to	O
Outlook	B-Application
Express	I-Application
.	O
</s>
<s>
Windows	B-Protocol
Mail	I-Protocol
is	O
a	O
fundamentally	O
new	O
application	O
with	O
significant	O
feature	O
additions	O
(	O
many	O
which	O
were	O
previously	O
exclusive	O
to	O
Internet	B-Application
Explorer	I-Application
or	O
Microsoft	B-Application
Outlook	I-Application
)	O
and	O
fundamental	O
revisions	O
to	O
the	O
storage	O
architecture	O
and	O
security	O
mechanisms	O
.	O
</s>
<s>
Identities	O
in	O
Outlook	B-Application
Express	I-Application
are	O
replaced	O
with	O
Windows	O
user	O
profiles	O
.	O
</s>
<s>
The	O
storage	O
of	O
items	O
is	O
managed	O
by	O
a	O
Extensible	B-Application
Storage	I-Application
Engine	I-Application
database	O
—	O
the	O
same	O
engine	O
used	O
by	O
Active	B-Protocol
Directory	I-Protocol
and	O
Microsoft	B-Application
Exchange	I-Application
—	O
with	O
messages	O
and	O
newsgroups	O
stored	O
as	O
separate	O
eml	O
and	O
nws	O
files	O
instead	O
of	O
in	O
a	O
single	O
dbx	O
file	O
;	O
the	O
database	O
is	O
transactional	O
and	O
periodically	O
creates	O
backups	O
of	O
items	O
to	O
protect	O
against	O
data	O
loss	O
,	O
which	O
eliminates	O
the	O
single	B-Architecture
point	I-Architecture
of	I-Architecture
failure	I-Architecture
design	O
of	O
Outlook	B-Application
Express	I-Application
.	O
</s>
<s>
Account	O
configuration	O
information	O
is	O
also	O
no	O
longer	O
stored	O
in	O
the	O
Windows	B-Protocol
Registry	I-Protocol
or	O
in	O
a	O
single	O
dbx	O
file	O
—	O
instead	O
,	O
Windows	B-Protocol
Mail	I-Protocol
relies	O
on	O
XML	B-Protocol
files	O
stored	O
within	O
a	O
user	O
profile	O
alongside	O
email	O
,	O
making	O
it	O
possible	O
to	O
simply	O
copy	O
an	O
entire	O
email	O
store	O
to	O
another	O
machine	O
.	O
</s>
<s>
Windows	B-Protocol
Mail	I-Protocol
supports	O
the	O
Windows	B-Application
Search	I-Application
platform	O
,	O
allowing	O
communications	O
to	O
be	O
searched	O
directly	O
from	O
within	O
the	O
Windows	O
Shell	O
.	O
</s>
<s>
Windows	B-Protocol
Mail	I-Protocol
is	O
also	O
intended	O
to	O
be	O
a	O
significantly	O
more	O
secure	O
offering	O
than	O
Outlook	B-Application
Express	I-Application
by	O
including	O
Bayesian	B-Application
spam	I-Application
filtering	I-Application
,	O
email	O
attachment	O
blocking	O
,	O
junk	O
email	O
filtering	O
functionality	O
of	O
Microsoft	B-Application
Exchange	I-Application
,	O
the	O
Phishing	O
Filter	O
of	O
Internet	B-Application
Explorer	I-Application
7	I-Application
,	O
and	O
top-level	O
domain	O
blocking	O
.	O
</s>
<s>
All	O
of	O
these	O
features	O
,	O
excluding	O
Internet	B-Application
Explorer	I-Application
Phishing	O
Filter	O
integration	O
were	O
included	O
in	O
Microsoft	B-Application
Office	I-Application
Outlook	I-Application
2003	O
as	O
part	O
of	O
Microsoft	B-General_Concept
Office	I-General_Concept
2003	I-General_Concept
.	O
</s>
<s>
Windows	B-Protocol
Mail	I-Protocol
has	O
a	O
documented	O
application	B-Application
programming	I-Application
interface	I-Application
(	O
API	B-Application
)	O
based	O
on	O
Component	B-Application
Object	I-Application
Model	I-Application
(	O
COM	O
)	O
.	O
</s>
<s>
Except	O
for	O
Simple	B-Protocol
MAPI	I-Protocol
messaging	O
functionality	O
,	O
the	O
API	B-Application
of	O
Outlook	B-Application
Express	I-Application
was	O
undocumented	O
.	O
</s>
<s>
Windows	B-Protocol
Mail	I-Protocol
is	O
excluded	O
from	O
Windows	B-Device
7	I-Device
in	O
favor	O
of	O
Windows	B-Application
Live	I-Application
Mail	I-Application
,	O
part	O
of	O
Windows	B-Application
Essentials	I-Application
.	O
</s>
<s>
Mail	O
in	O
Windows	B-Application
8	I-Application
and	O
8.1	B-Device
is	O
a	O
completely	O
new	O
application	O
based	O
on	O
the	O
Windows	O
Runtime	O
,	O
designed	O
in	O
accordance	O
with	O
Microsoft	O
's	O
Metro	O
design	O
language	O
philosophy	O
,	O
as	O
a	O
Windows	O
Store	O
app	O
that	O
runs	O
in	O
either	O
full-screen	O
or	O
split-screen	O
viewing	O
modes	O
;	O
many	O
of	O
its	O
features	O
are	O
hidden	O
in	O
the	O
charms	O
or	O
in	O
the	O
app	O
bar	O
(	O
an	O
initially	O
hidden	O
toolbar	O
)	O
at	O
the	O
bottom	O
of	O
the	O
screen	O
that	O
is	O
revealed	O
by	O
right-clicking	O
or	O
by	O
swiping	O
upward	O
.	O
</s>
<s>
Mail	O
is	O
updated	O
independently	O
from	O
the	O
operating	O
system	O
and	O
is	O
bundled	O
with	O
Calendar	B-Protocol
and	O
People	O
—	O
it	O
cannot	O
be	O
installed	O
or	O
uninstalled	O
individually	O
.	O
</s>
<s>
Preset	O
server	O
configurations	O
for	O
Outlook.com,	O
Gmail	B-Application
,	O
AOL	B-Application
Mail	I-Application
,	O
and	O
Yahoo	O
!	O
</s>
<s>
Mail	O
are	O
available	O
;	O
Exchange	B-Operating_System
Server	I-Operating_System
or	O
IMAP	B-Protocol
accounts	O
can	O
be	O
configured	O
,	O
but	O
Mail	O
does	O
not	O
directly	O
support	O
POP3	B-Protocol
.	O
</s>
<s>
Mail	O
in	O
Windows	B-Operating_System
10	I-Operating_System
and	O
11	B-Application
has	O
preset	O
server	O
configurations	O
for	O
Outlook.com,	O
Office	B-Operating_System
365	I-Operating_System
,	O
Gmail	B-Application
,	O
iCloud	B-Application
,	O
and	O
Yahoo	O
!	O
</s>
<s>
AOL	B-Application
Mail	I-Application
,	O
as	O
well	O
as	O
other	O
Exchange	B-Operating_System
Server	I-Operating_System
and	O
IMAP	B-Protocol
accounts	O
,	O
can	O
still	O
be	O
added	O
,	O
and	O
POP3	B-Protocol
support	O
has	O
returned	O
.	O
</s>
<s>
Mail	O
and	O
Calendar	B-Protocol
are	O
still	O
Universal	O
Windows	O
apps	O
and	O
are	O
in	O
the	O
same	O
app	O
container	O
,	O
but	O
their	O
third	O
sibling	O
,	O
People	O
,	O
is	O
moved	O
out	O
of	O
this	O
container	O
and	O
is	O
a	O
standalone	O
app	O
by	O
itself	O
.	O
</s>
<s>
Users	O
can	O
set	O
Mail	O
to	O
use	O
the	O
system	O
theme	B-Application
or	O
choose	O
a	O
custom	O
accent	O
color	O
,	O
background	O
image	O
,	O
and	O
light/dark	O
preference	O
.	O
</s>
<s>
Like	O
the	O
Vista	B-Application
version	O
of	O
Mail	O
,	O
this	O
version	O
's	O
important	O
controls	O
are	O
readily	O
visible	O
.	O
</s>
<s>
It	O
is	O
possible	O
to	O
use	O
Outlook.com	B-Operating_System
aliases	O
and	O
@mentions	O
with	O
Mail	O
.	O
</s>
<s>
Like	O
Microsoft	B-Application
Outlook	I-Application
,	O
Mail	O
allows	O
users	O
to	O
set	O
up	O
Quick	O
Actions	O
,	O
such	O
as	O
Delete	O
,	O
Set	O
Flag	O
,	O
and	O
Archive	O
,	O
to	O
respond	O
to	O
messages	O
from	O
system	O
notifications	O
and	O
swipe	O
gestures	O
.	O
</s>
<s>
In	O
December	O
2019	O
,	O
Mail	O
added	O
non-removable	O
advertisements	O
for	O
the	O
Microsoft	B-Application
Outlook	I-Application
mobile	I-Application
app	I-Application
.	O
</s>
<s>
As	O
with	O
Microsoft	B-Application
Outlook	I-Application
and	O
Outlook	B-Application
Express	I-Application
,	O
Mail	O
uses	O
to	O
invoke	O
the	O
search	O
.	O
</s>
