Major Description
EmailValidator does not support escaped quotes '\"' within a quoted string as specified by RFC5322 section 3.2.4 as well as in the older RFC2822 section 3.2.5.
These sections indicate that a quoted string can contain a quoted pair (escaped characters), where a quoted pair is defined as (in RFC5322):
quoted-pair = ("\" (VCHAR / WSP)) / obs-qp
VCHAR = %x21-7E; visible (printing) characters
The " character is %x22 which falls under the definition of VCHAR above.
Examples:
"example\"email"@example.org