GOOD
("Subject: Oc\xE9 3165 Network Copier down for maintenance", "iso-8859-1")
Subject: =?ISO-8859-1?Q?Oc=E9_3165_Network_Copier_down_for_maintenance?=

BAD
("")
Subject: =?ISO-8859-1?Q?Oc=E9_3165_Network_Copier_down_for_maintenance?

BAD
("")
Subject: =?ISO-8859-1?Q?Oc=E9_3165_Network_Copier_down_for_maintenance

GOOD
("Keith Moore <moore\@cs.utk.edu>", "us-ascii")
=?US-ASCII?Q?Keith_Moore?= <moore@cs.utk.edu>

GOOD
("Keld J\xF8rn Simonsen <keld\@dkuug.dk>", "iso-8859-1")
=?ISO-8859-1?Q?Keld_J=F8rn_Simonsen?= <keld@dkuug.dk>

GOOD
("Andr\xE9 (<- one space) Pirard <PIRARD\@vm1.ulg.ac.be>", "iso-8859-1")
=?ISO-8859-1?Q?Andr=E9_?=(<- one space) Pirard <PIRARD@vm1.ulg.ac.be>

GOOD
("Andr\xE9  (<- two spaces) Pirard <PIRARD\@vm1.ulg.ac.be>", "iso-8859-1")
=?ISO-8859-1?Q?Andr=E9_?= (<- two spaces) Pirard <PIRARD@vm1.ulg.ac.be>

GOOD
("If you can read this you understand the example... cool!", "us-ascii")
=?ISO-8859-1?B?SWYgeW91IGNhbiByZWFkIHRoaXMgeW8=?==?ISO-8859-2?B?dSB1bmRlcnN0YW5kIHRoZSBleGFtcGxlLg==?==?US-ASCII?Q?.._cool!?=

GOOD
("If you can read this you understand the example... cool!", "us-ascii")
=?ISO-8859-1?B?SWYgeW91IGNhbiByZWFkIHRoaXMgeW8=?=
	=?ISO-8859-2?B?dSB1bmRlcnN0YW5kIHRoZSBleGFtcGxlLg==?=
	=?US-ASCII?Q?.._cool!?=

GOOD
("_-_", "us-ascii")
=?ISO-8859-1?Q?=5F-=5F?=