<s>
GMX	B-General_Concept
Mail	I-General_Concept
is	O
a	O
free	O
advertising-supported	O
email	O
service	O
provided	O
by	O
GMX	B-General_Concept
(	O
Global	B-General_Concept
Mail	I-General_Concept
eXchange	I-General_Concept
,	O
in	O
Germany	O
:	O
Global	O
Message	O
eXchange	O
)	O
.	O
</s>
<s>
Users	O
may	O
access	O
received	O
GMX	B-General_Concept
Mail	I-General_Concept
via	O
webmail	B-Protocol
,	O
or	O
using	O
POP3	B-Protocol
or	O
IMAP4	B-Protocol
protocols	O
.	O
</s>
<s>
Mail	O
is	O
sent	O
using	O
SMTP	B-Protocol
.	O
</s>
<s>
Founded	O
in	O
1997	O
,	O
GMX	B-General_Concept
is	O
a	O
subsidiary	O
of	O
United	O
Internet	O
AG	O
,	O
a	O
stock-listed	O
company	O
in	O
Germany	O
,	O
and	O
a	O
sister	O
company	O
to	O
1&1	O
Internet	O
and	O
Fasthosts	O
Internet	O
.	O
</s>
<s>
In	O
addition	O
to	O
an	O
email	O
address	O
,	O
each	O
GMX	B-General_Concept
account	O
includes	O
a	O
Mail	O
Collector	O
,	O
Address	O
Book	O
,	O
Organizer	O
,	O
and	O
File	O
Storage	O
.	O
</s>
<s>
Every	O
user	O
can	O
register	O
up	O
to	O
10	O
individual	O
GMX	B-General_Concept
email	O
addresses	O
.	O
</s>
<s>
Popup	O
ads	O
are	O
displayed	O
to	O
all	O
users	O
,	O
including	O
premium	O
,	O
at	O
login	O
;	O
GMX	B-General_Concept
was	O
the	O
only	O
large	O
email	O
provider	O
using	O
popup	O
ads	O
.	O
</s>
<s>
GMX	B-General_Concept
Mail	I-General_Concept
provides	O
GMX.net	B-General_Concept
and	O
GMX.com	B-General_Concept
users	O
two-factor	O
authentication	O
(	O
2FA	O
)	O
as	O
a	O
security	O
measure	O
.	O
</s>
<s>
Features	O
included	O
in	O
the	O
free	O
versions	O
of	O
the	O
GMX	B-General_Concept
Mail	I-General_Concept
account	O
differ	O
between	O
GMX.net	B-General_Concept
and	O
GMX.com	B-General_Concept
:	O
</s>
<s>
It	O
allows	O
the	O
addition	O
of	O
up	O
to	O
10	O
add-on	O
addresses	O
at	O
different	O
GMX	B-General_Concept
domains	O
.	O
</s>
<s>
GMX	B-General_Concept
developed	O
slightly	O
different	O
clients	O
for	O
users	O
in	O
German-speaking	O
countries	O
and	O
elsewhere	O
.	O
</s>
<s>
Both	O
are	O
free	O
for	O
email	O
service	O
,	O
and	O
direct	O
users	O
to	O
the	O
appropriate	O
gmx.net	B-General_Concept
or	O
gmx.com	B-General_Concept
through	O
geolocation	O
technology	O
.	O
</s>
<s>
The	O
GMX	B-General_Concept
Mail	I-General_Concept
service	O
is	O
based	O
on	O
Qooxdoo	B-Language
,	O
an	O
open	B-License
source	I-License
ajax	O
web	B-Application
application	I-Application
framework	I-Application
.	O
</s>
<s>
Following	O
the	O
closure	O
of	O
Lycos	O
Europe	O
and	O
its	O
decision	O
to	O
close	O
Caramail	O
,	O
a	O
popular	O
French	O
webmail	B-Protocol
service	O
,	O
in	O
February	O
2009	O
GMX	B-General_Concept
bought	O
the	O
Caramail	O
domain	O
name	O
and	O
transferred	O
older	O
Caramail	O
users	O
to	O
its	O
new	O
service	O
.	O
</s>
<s>
In	O
2010	O
,	O
GMX	B-General_Concept
acquired	O
American	O
internet	O
domain	O
Mail.com	O
and	O
its	O
email	O
customers	O
.	O
</s>
