<s>
Mailplane	B-Protocol
is	O
an	O
e-mail	B-Protocol
client	I-Protocol
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
that	O
"	O
wraps	O
"	O
the	O
Gmail	B-Application
service	O
as	O
a	O
site-specific	B-Protocol
browser	I-Protocol
.	O
</s>
<s>
This	O
gives	O
the	O
user	O
a	O
more	O
application-like	O
experience	O
than	O
using	O
Gmail	B-Application
in	O
a	O
browser	O
,	O
including	O
the	O
ability	O
to	O
drag	O
and	O
drop	O
files	O
into	O
attachments	O
,	O
use	O
the	O
OS	B-Operating_System
X	I-Operating_System
Address	B-Operating_System
Book	I-Operating_System
and	O
Keychain	B-Application
,	O
use	O
spell	B-Application
checking	I-Application
,	O
easily	O
send	O
images	O
,	O
and	O
use	O
Gmail	B-Application
as	O
the	O
outbound	O
mailer	O
when	O
clicking	O
on	O
mailto	O
links	O
.	O
</s>
<s>
It	O
is	O
written	O
using	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
's	O
Cocoa	B-Operating_System
and	O
WebKit	B-Language
APIs	B-Application
.	O
</s>
<s>
Since	O
July	O
8	O
,	O
2020	O
,	O
of	O
Mailplane	B-Protocol
version	O
3	O
no	O
longer	O
has	O
access	O
to	O
Gmail	B-Application
data	O
,	O
rendering	O
it	O
inoperable	O
.	O
</s>
<s>
Since	O
June	O
6	O
,	O
2021	O
,	O
Mailplane	B-Protocol
is	O
no	O
longer	O
for	O
sale	O
due	O
to	O
Google	O
considering	O
their	O
method	O
of	O
email	O
access	O
(	O
using	O
embedded	O
browser	O
)	O
to	O
be	O
a	O
security	O
issue	O
.	O
</s>
<s>
The	O
Verge	O
does	O
not	O
provide	O
a	O
rating	O
as	O
such	O
,	O
but	O
rates	O
it	O
highly	O
in	O
their	O
review	O
,	O
while	O
a	O
roundup	O
of	O
similar	O
software	O
by	O
AppleInsider	O
stated	O
"	O
MailPlane	B-Protocol
offers	O
the	O
best	O
OS	B-Operating_System
X	I-Operating_System
experience	O
of	O
any	O
third	O
party	O
mail	O
application.	O
"	O
</s>
