From user@domain  Fri Feb 22 23:00:00 2008 +0200
To: foo bar <a@b.c>

1

From user@domain  Fri Feb 22 23:00:00 2008 +0200
To: b@c.d

2

From user@domain  Fri Feb 22 23:00:00 2008 +0200
To: d

3

From user@domain  Fri Feb 22 23:00:00 2008 +0200
To: =?iso-8859-1?q?foo_aar?= <e@f.g>

4

From user@domain  Fri Feb 22 23:00:00 2008 +0200
To: =?iso-8859-1?q?foo_car?= <f@g.h>

5

From user@domain  Fri Feb 22 23:00:00 2008 +0200
To: a: xx@xx.org, yy@yy.org;

6

From user@domain  Fri Feb 22 23:00:00 2008 +0200
To: z: aa@aa.org, bb@bb.org;

7

From user@domain  Fri Feb 22 23:00:00 2008 +0200
To: empty:;

8