<s>
Eudora	B-Operating_System
is	O
an	O
email	B-Protocol
client	I-Protocol
that	O
was	O
used	O
on	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
and	O
Microsoft	B-Application
Windows	I-Application
operating	I-Application
systems	I-Application
.	O
</s>
<s>
It	O
also	O
supported	O
several	O
palmtop	B-Application
computing	O
platforms	O
,	O
including	O
Newton	B-Device
and	O
the	O
Palm	B-Operating_System
OS	I-Operating_System
.	O
</s>
<s>
Eudora	B-Operating_System
was	O
developed	O
in	O
1988	O
by	O
Steve	O
Dorner	O
,	O
who	O
worked	O
at	O
the	O
Computer	O
Services	O
Organization	O
of	O
the	O
University	O
of	O
Illinois	O
at	O
Urbana	O
–	O
Champaign	O
.	O
</s>
<s>
The	O
software	O
was	O
named	O
after	O
American	O
author	O
Eudora	B-Operating_System
Welty	O
,	O
because	O
of	O
her	O
short	O
story	O
"	O
Why	O
I	O
Live	O
at	O
the	O
P.O.	O
</s>
<s>
Eudora	B-Operating_System
was	O
acquired	O
by	O
Qualcomm	O
in	O
1991	O
.	O
</s>
<s>
Originally	O
distributed	O
free	O
of	O
charge	O
,	O
Eudora	B-Operating_System
was	O
commercialized	O
and	O
offered	O
as	O
a	O
Light	O
(	O
freeware	B-License
)	O
and	O
Pro	O
(	O
commercial	O
)	O
product	O
.	O
</s>
<s>
In	O
2006	O
Qualcomm	O
stopped	O
development	O
of	O
the	O
commercial	O
version	O
and	O
sponsored	O
the	O
creation	O
of	O
a	O
new	O
open-source	B-Application
version	O
based	O
on	O
Mozilla	B-Application
Thunderbird	I-Application
,	O
code-named	O
Penelope	B-Protocol
,	O
later	O
renamed	O
to	O
Eudora	B-Protocol
OSE	I-Protocol
.	O
</s>
<s>
Development	O
of	O
the	O
open-source	B-Application
version	O
stopped	O
in	O
2010	O
and	O
was	O
officially	O
deprecated	B-General_Concept
in	O
2013	O
,	O
with	O
users	O
advised	O
to	O
switch	O
to	O
the	O
current	O
version	O
of	O
Thunderbird	B-Application
.	O
</s>
<s>
Eudora	B-Operating_System
(	O
6.0.1	O
)	O
added	O
support	O
for	O
Bayesian	B-Application
filtering	I-Application
of	O
spam	O
with	O
a	O
feature	O
called	O
SpamWatch	O
.	O
</s>
<s>
Eudora	B-Operating_System
(	O
6.2	O
)	O
added	O
a	O
scam	O
watch	O
feature	O
that	O
flags	O
suspicious	O
links	O
within	O
emails	O
in	O
an	O
attempt	O
to	O
thwart	O
phishing	O
.	O
</s>
<s>
Eudora	B-Operating_System
(	O
7.0	O
)	O
added	O
ultra-fast	O
search	O
,	O
which	O
finds	O
any	O
emails	O
using	O
single	O
or	O
multiple	O
criteria	O
in	O
seconds	O
.	O
</s>
<s>
Eudora	B-Operating_System
has	O
support	O
for	O
"	O
stationery	O
"	O
,	O
a	O
standard	O
message	O
or	O
reply	O
prepared	O
ahead	O
of	O
time	O
to	O
a	O
common	O
question	O
.	O
</s>
<s>
Eudora	B-Operating_System
stores	O
emails	O
in	O
a	O
modified	O
mbox	O
format	O
( *	O
.mbx	O
)	O
,	O
which	O
uses	O
plain	O
text	B-General_Concept
files	I-General_Concept
instead	O
of	O
a	O
database	O
as	O
Microsoft	B-Application
Outlook	I-Application
does	O
.	O
</s>
<s>
Eudora	B-Operating_System
supports	O
the	O
POP3	B-Protocol
,	O
IMAP	B-Protocol
and	O
SMTP	B-Protocol
protocols	I-Protocol
.	O
</s>
<s>
Eudora	B-Operating_System
also	O
has	O
support	O
for	O
SSL	O
and	O
,	O
in	O
Windows	B-Application
,	O
S/MIME	O
authentication	O
,	O
allowing	O
users	O
to	O
sign	O
or	O
encrypt	O
email	O
communications	O
for	O
greatest	O
security	O
.	O
</s>
<s>
Eudora	B-Operating_System
is	O
noteworthy	O
for	O
its	O
extensive	O
variety	O
of	O
settings	O
to	O
customize	O
its	O
behavior	O
,	O
many	O
of	O
which	O
are	O
not	O
available	O
in	O
the	O
user	O
interface	O
but	O
are	O
accessed	O
using	O
x-eudora-setting	O
URIs	O
that	O
must	O
be	O
pasted	O
into	O
a	O
message	O
and	O
clicked	O
.	O
</s>
<s>
At	O
one	O
time	O
,	O
Eudora	B-Operating_System
also	O
offered	O
a	O
webmail	B-Protocol
service	O
at	O
eudoramail.com	O
.	O
</s>
<s>
This	O
service	O
was	O
run	O
by	O
Lycos	B-Application
as	O
part	O
of	O
Mailcity	B-Application
,	O
later	O
renamed	O
Lycos	B-Application
Mail	I-Application
.	O
</s>
<s>
In	O
2006	O
,	O
Eudoramail	B-Operating_System
addresses	O
for	O
users	O
were	O
still	O
working	O
(	O
and	O
were	O
redirected	O
to	O
Lycos	B-Application
Mail	I-Application
accounts	O
)	O
,	O
but	O
new	O
users	O
could	O
no	O
longer	O
sign	O
up	O
for	O
the	O
service	O
.	O
</s>
<s>
Eudora	B-Operating_System
for	O
Windows	B-Application
never	O
had	O
any	O
form	O
of	O
support	O
for	O
character	B-General_Concept
encoding	I-General_Concept
and	O
was	O
hardcoded	O
to	O
declare	O
every	O
email	O
sent	O
as	O
encoded	O
iso-8859-1	O
,	O
regardless	O
of	O
the	O
actual	O
content	O
,	O
and	O
displayed	O
every	O
incoming	O
email	O
using	O
the	O
system	O
encoding	O
(	O
one	O
of	O
the	O
Windows	B-Application
encodings	O
,	O
depending	O
on	O
the	O
language	O
version	O
of	O
the	O
system	O
)	O
.	O
</s>
<s>
At	O
least	O
two	O
third-party	O
plugins	O
exist	O
that	O
can	O
convert	O
characters	O
that	O
also	O
exist	O
in	O
iso-8859-1	O
,	O
and	O
it	O
's	O
also	O
possible	O
to	O
run	O
it	O
with	O
"	O
Mime-proxy	O
"	O
,	O
but	O
depending	O
on	O
a	O
specific	O
user	O
's	O
needs	O
and	O
due	O
in	O
part	O
to	O
the	O
internal	O
limitations	O
of	O
Eudora	B-Operating_System
they	O
may	O
only	O
offer	O
a	O
partial	O
solution	O
.	O
</s>
<s>
On	O
May	O
22	O
,	O
2018	O
,	O
after	O
five	O
years	O
of	O
discussion	O
with	O
Qualcomm	O
,	O
the	O
Computer	O
History	O
Museum	O
acquired	O
full	O
ownership	O
of	O
the	O
source	O
code	O
,	O
the	O
Eudora	B-Operating_System
trademarks	O
,	O
copyrights	O
,	O
and	O
domain	O
names	O
.	O
</s>
<s>
The	O
transfer	O
agreement	O
from	O
Qualcomm	O
also	O
allowed	O
the	O
Computer	O
History	O
Museum	O
to	O
publish	O
the	O
source	O
code	O
under	O
the	O
BSD	B-Operating_System
open	O
source	O
license	O
.	O
</s>
<s>
The	O
Eudora	B-Operating_System
source	O
code	O
distributed	O
by	O
the	O
Computer	O
History	O
Museum	O
is	O
the	O
same	O
except	O
for	O
the	O
addition	O
of	O
the	O
new	O
license	O
,	O
sanitization	O
of	O
"	O
bad	O
words	O
"	O
found	O
mostly	O
in	O
comment	O
sections	O
of	O
the	O
code	O
and	O
the	O
removal	O
of	O
third-party	O
software	O
that	O
neither	O
the	O
museum	O
nor	O
Qualcomm	O
had	O
the	O
right	O
to	O
distribute	O
.	O
</s>
<s>
In	O
2018	O
,	O
a	O
"	O
small	O
team	O
"	O
started	O
working	O
on	O
repairing	O
Eudora	B-Operating_System
to	O
update	O
it	O
for	O
modern	O
use	O
,	O
using	O
crowd	O
funding	O
to	O
facilitate	O
their	O
effort	O
,	O
branded	O
as	O
Hermes	O
Mail	O
.	O
</s>
<s>
Initial	O
focus	O
was	O
"	O
a	O
'	O
software	O
bridge	O
 '	O
to	O
mediate	O
between	O
QUALCOMM	B-Operating_System
Eudora	I-Operating_System
7	O
for	O
Windows	B-Application
and	O
modern	O
OpenSSL	O
"	O
in	O
response	O
to	O
the	O
Heartbleed	O
vulnerability	O
and	O
resulted	O
in	O
the	O
release	O
of	O
updated	O
cryptographic	O
DLL	O
files	O
.	O
</s>
