prettyandsimple
very.common
disposable.style.email.with+symbol
other.email-with-dash
"much.more unusual"
"very.unusual.@.unusual.com"
"very.(),:;<>[]\".VERY.\"very@\\\ \"very\".unusual"
example-indeed
!#$%&'*+-/=?^_`{}|~
"()<>[]:,;@\\\"!#$%&'-/=?^_`{}|~.a"
"multi"."quote"."is-allowed"
this_is.also."valid"
" "
"next-char-is-tab:	"
" abc"
"abc "
"  abc  "
"abc. "
//
"\abc"
-abc
;abc
A@b@c
a"b(c)d,e:f;g<h>i[j\k]l
just"not"right
this is"not\allowed
this\ still\"not\\allowed
john..doe
.
.abc
# fail
abc.
# pass
"abc."
#
abc.@
abc. space-before
	tab-before
"\"
"\ 
# next is empty line

 space-before
\
\\
"CR:
"
"DEL:"
