Localpart Characters
This table lists the characters allowed in the localpart of an SMTP mail address.
The characters marked with a are allowed in atoms. Normally the localpart consists of atoms optionally separated by dots.
The characters marked with " are only allowed if the whole localpart is enclosed in double quotes. The characters marked with \ must additionally be escaped by preceding them with a backslash.
(Note: RFC 5322 addresses are a superset of RFC 5321 addresses)
" | 0020 | 32 | 000040 | SPACE | |
a | 0021 | 33 | 000041 | ! | EXCLAMATION MARK |
\ | 0022 | 34 | 000042 | " | QUOTATION MARK |
a | 0023 | 35 | 000043 | # | NUMBER SIGN |
a | 0024 | 36 | 000044 | $ | DOLLAR SIGN |
a | 0025 | 37 | 000045 | % | PERCENT SIGN |
a | 0026 | 38 | 000046 | & | AMPERSAND |
a | 0027 | 39 | 000047 | ' | APOSTROPHE |
" | 0028 | 40 | 000050 | ( | LEFT PARENTHESIS |
" | 0029 | 41 | 000051 | ) | RIGHT PARENTHESIS |
a | 002a | 42 | 000052 | * | ASTERISK |
a | 002b | 43 | 000053 | + | PLUS SIGN |
" | 002c | 44 | 000054 | , | COMMA |
a | 002d | 45 | 000055 | - | HYPHEN-MINUS |
. | 002e | 46 | 000056 | . | FULL STOP |
a | 002f | 47 | 000057 | / | SOLIDUS |
a | 0030 | 48 | 000060 | 0 | DIGIT ZERO |
a | 0031 | 49 | 000061 | 1 | DIGIT ONE |
a | 0032 | 50 | 000062 | 2 | DIGIT TWO |
a | 0033 | 51 | 000063 | 3 | DIGIT THREE |
a | 0034 | 52 | 000064 | 4 | DIGIT FOUR |
a | 0035 | 53 | 000065 | 5 | DIGIT FIVE |
a | 0036 | 54 | 000066 | 6 | DIGIT SIX |
a | 0037 | 55 | 000067 | 7 | DIGIT SEVEN |
a | 0038 | 56 | 000070 | 8 | DIGIT EIGHT |
a | 0039 | 57 | 000071 | 9 | DIGIT NINE |
" | 003a | 58 | 000072 | : | COLON |
" | 003b | 59 | 000073 | ; | SEMICOLON |
" | 003c | 60 | 000074 | < | LESS-THAN SIGN |
a | 003d | 61 | 000075 | = | EQUALS SIGN |
" | 003e | 62 | 000076 | > | GREATER-THAN SIGN |
a | 003f | 63 | 000077 | ? | QUESTION MARK |
" | 0040 | 64 | 000100 | @ | COMMERCIAL AT |
a | 0041 | 65 | 000101 | A | LATIN CAPITAL LETTER A |
a | 0042 | 66 | 000102 | B | LATIN CAPITAL LETTER B |
a | 0043 | 67 | 000103 | C | LATIN CAPITAL LETTER C |
a | 0044 | 68 | 000104 | D | LATIN CAPITAL LETTER D |
a | 0045 | 69 | 000105 | E | LATIN CAPITAL LETTER E |
a | 0046 | 70 | 000106 | F | LATIN CAPITAL LETTER F |
a | 0047 | 71 | 000107 | G | LATIN CAPITAL LETTER G |
a | 0048 | 72 | 000110 | H | LATIN CAPITAL LETTER H |
a | 0049 | 73 | 000111 | I | LATIN CAPITAL LETTER I |
a | 004a | 74 | 000112 | J | LATIN CAPITAL LETTER J |
a | 004b | 75 | 000113 | K | LATIN CAPITAL LETTER K |
a | 004c | 76 | 000114 | L | LATIN CAPITAL LETTER L |
a | 004d | 77 | 000115 | M | LATIN CAPITAL LETTER M |
a | 004e | 78 | 000116 | N | LATIN CAPITAL LETTER N |
a | 004f | 79 | 000117 | O | LATIN CAPITAL LETTER O |
a | 0050 | 80 | 000120 | P | LATIN CAPITAL LETTER P |
a | 0051 | 81 | 000121 | Q | LATIN CAPITAL LETTER Q |
a | 0052 | 82 | 000122 | R | LATIN CAPITAL LETTER R |
a | 0053 | 83 | 000123 | S | LATIN CAPITAL LETTER S |
a | 0054 | 84 | 000124 | T | LATIN CAPITAL LETTER T |
a | 0055 | 85 | 000125 | U | LATIN CAPITAL LETTER U |
a | 0056 | 86 | 000126 | V | LATIN CAPITAL LETTER V |
a | 0057 | 87 | 000127 | W | LATIN CAPITAL LETTER W |
a | 0058 | 88 | 000130 | X | LATIN CAPITAL LETTER X |
a | 0059 | 89 | 000131 | Y | LATIN CAPITAL LETTER Y |
a | 005a | 90 | 000132 | Z | LATIN CAPITAL LETTER Z |
" | 005b | 91 | 000133 | [ | LEFT SQUARE BRACKET |
\ | 005c | 92 | 000134 | \ | REVERSE SOLIDUS |
" | 005d | 93 | 000135 | ] | RIGHT SQUARE BRACKET |
a | 005e | 94 | 000136 | ^ | CIRCUMFLEX ACCENT |
a | 005f | 95 | 000137 | _ | LOW LINE |
a | 0060 | 96 | 000140 | ` | GRAVE ACCENT |
a | 0061 | 97 | 000141 | a | LATIN SMALL LETTER A |
a | 0062 | 98 | 000142 | b | LATIN SMALL LETTER B |
a | 0063 | 99 | 000143 | c | LATIN SMALL LETTER C |
a | 0064 | 100 | 000144 | d | LATIN SMALL LETTER D |
a | 0065 | 101 | 000145 | e | LATIN SMALL LETTER E |
a | 0066 | 102 | 000146 | f | LATIN SMALL LETTER F |
a | 0067 | 103 | 000147 | g | LATIN SMALL LETTER G |
a | 0068 | 104 | 000150 | h | LATIN SMALL LETTER H |
a | 0069 | 105 | 000151 | i | LATIN SMALL LETTER I |
a | 006a | 106 | 000152 | j | LATIN SMALL LETTER J |
a | 006b | 107 | 000153 | k | LATIN SMALL LETTER K |
a | 006c | 108 | 000154 | l | LATIN SMALL LETTER L |
a | 006d | 109 | 000155 | m | LATIN SMALL LETTER M |
a | 006e | 110 | 000156 | n | LATIN SMALL LETTER N |
a | 006f | 111 | 000157 | o | LATIN SMALL LETTER O |
a | 0070 | 112 | 000160 | p | LATIN SMALL LETTER P |
a | 0071 | 113 | 000161 | q | LATIN SMALL LETTER Q |
a | 0072 | 114 | 000162 | r | LATIN SMALL LETTER R |
a | 0073 | 115 | 000163 | s | LATIN SMALL LETTER S |
a | 0074 | 116 | 000164 | t | LATIN SMALL LETTER T |
a | 0075 | 117 | 000165 | u | LATIN SMALL LETTER U |
a | 0076 | 118 | 000166 | v | LATIN SMALL LETTER V |
a | 0077 | 119 | 000167 | w | LATIN SMALL LETTER W |
a | 0078 | 120 | 000170 | x | LATIN SMALL LETTER X |
a | 0079 | 121 | 000171 | y | LATIN SMALL LETTER Y |
a | 007a | 122 | 000172 | z | LATIN SMALL LETTER Z |
a | 007b | 123 | 000173 | { | LEFT CURLY BRACKET |
a | 007c | 124 | 000174 | | | VERTICAL LINE |
a | 007d | 125 | 000175 | } | RIGHT CURLY BRACKET |
a | 007e | 126 | 000176 | ~ | TILDE |