justastring
email@addrese.com;secondemail@address.com
@address.com
Jacco Van Tuijl <email@example.com>
email.address.com
email@address@example.com
#@%^%#$@#$@#.com
.email@address.com
うえあいお@address.com
email.@address.com
email..email@address.com
email@address..com
email@address.com (Jacco van Tuijl)
email@-address.com
email@111.222.333.44444
Abc..123@address.com
“(),:;<>[\]@address.com
jacco"van"tuijl@address.com
jacco\ van"someting"tuijl\example@address.com
“email”@address.com
sql"or"1"="1"or"test@email.com
sql'or'1'='1'or'test@email.com
xss"><script>alert(1)</script><"test@address.com
a"b(c)d,e:f;g<h>i[j\k]l@example.com
this is"not\allowed@example.com
notallowed@example.com 
 notallowed@example.com