What does "the syntax of RFC822" means in javax.mail.internet.InternetAddress ?

Javadoc of JavaMail API says InternetAddress class uses "the syntax of RFC822". https://javaee.github.io/javamail/docs/api/javax/mail/internet/InternetAddress.html

Then how about actual implementation? Is it different from some other email validation implementation like <input type="email">?

I have tested following implementation of email address validation and compared results.

InternetAddress *1 class in JavaMail *2
<input type="email"> implementation described in HTML Living Standard 25 June 2020 *3 , /^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/
"General Email Regex (RFC 5322 Official Standard)" described in Almost Perfect Email Regex *4, (?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])
Regexp used in Perl 正規表現雑技 *5 , /^(?:[-!#-'*+/-9=?A-Z^-~]+(?:\.[-!#-'*+/-9=?A-Z^-~]+)*|"(?:[!#-\[\]-~]|\\[\x09 -~])*")@[-!#-'*+/-9=?A-Z^-~]+(?:\.[-!#-'*+/-9=?A-Z^-~]+)*$/ (Popular in Japan)

I have used http://www.htmq.com/html5/input_type_email.shtml to test behavior of <input type="email">. Also I have used https://codepen.io/shingorow/pen/oBPZbL to test the regexps.

The results is shown in the table below.

#	Test case	Address	JavaMail	HTML Living Standard	Almost Perfect Email Regex	Perl 正規表現雑技
1	ordinal address	`abc.def@example.com`	valid	valid	valid	valid
2	quoted by double quote	`"abc.def"@example.com`	valid	invalid	valid	invalid
3	quoted by double quote and contain newline + space	`"abc.\n def"@example.com`	valid	invalid (*)	invalid (*)	invalid (*)
4	quoted by double quote and joined by "."	`"abc"."def"@example.com`	invalid *6	invalid	invalid	invalid
5	quoted by single quote	`'abc.def'@example.com`	valid	valid	valid	valid
6	quoted by single quote and contain newline + space	`'abc.\n def'@example.com`	invalid *7	invalid (*)	invalid (*)	invalid (*)
7	quoted by single quote and name joined by "."	`'abc'.'def'@example.com`	valid	valid	valid	valid
8	contains comment with parenthesis	`(abc)abc.def@example.com`	valid	invalid	invalid	invalid
9	contains comment with parenthesis and space	`(abc) abc.def@example.com`	valid	invalid	invalid	invalid
10	address with angle bracket	`<abc.def@example.com>`	valid	invalid	invalid	invalid
11	address with angle bracket and newline	`<abc\n .def@example.com>`	invalid *8	invalid (*)	invalid (*)	invalid (*)
12	address with angle bracket and quote	`<abc"def"ghi@example.com>`	invalid *9	invalid	invalid	invalid
13	address with real name	`foo bar <abc.def@example.com>`	valid	invalid	invalid	invalid
14	address with real name (single-quoted)	`'foo bar' <abc.def@example.com>`	valid	invalid	invalid	invalid
15	address with real name (double-quoted)	`"foo bar" <abc.def@example.com>`	valid	invalid	invalid	invalid
16	domain with square bracket	`abc.def@[example.com]`	valid	invalid	invalid	invalid
17	domain with square bracket and space	`abc.def@[exa mple.com]`	invalid *10	invalid	invalid	invalid
18	domain with square bracket and escaped character	`abc.def@[exa\nmple.com]`	invalid *11	invalid (*)	invalid (*)	invalid (*)
19	domain with square bracket and quote	`abc.def@[example."hoge".com]`	valid	invalid	invalid	invalid
20	start with comma	`,abc.def@example.com`	valid	invalid	invalid	invalid
21	start with semicolon	`;abc.def@example.com`	valid	invalid	invalid	invalid
22	contains double-dot	`abc..def@example.com`	invalid *12	valid	invalid	invalid
23	local address ends with dot	`abc.def.@example.com`	invalid *13	valid	invalid	invalid
24	local address starts with dot	`.abc.def@example.com`	invalid *14	valid	invalid	invalid
25	contains character outside of ASCII	`⛄bc.def@example.com`	valid	invalid	invalid	invalid
26	domain without TLD	`abc.def@localhost`	valid	valid	invalid	valid
27	domain with 1 char TLD	`abc.def@e.c`	valid	valid	valid	valid
28	domain with 2 char TLD	`abc.def@e.co`	valid	valid	valid	valid
29	domain not compliant with RFC952	`abc.def@-.com`	valid	invalid	invalid	valid
30	host specified in IP address	`abc.def@203.0.113.1`	valid	valid	valid	valid
31	capital local address	`ABC.DEF@example.com`	valid	valid	invalid	valid
32	tags in the double-quoted name	`"<script>" <abc.def@example.com>`	valid	invalid	invalid	invalid
33	tags in the single-quoted name	`'<script>' <abc.def@example.com>`	invalid *15	invalid	invalid	invalid