$rfc5322:obs-utext
[\u0000-\u0008\u000B-\u000C\u000E-\u001F!-\u007F]
[\x00-\x08\x0B-\x0C\x0E-\x1F!-\x7F]
Test a string: Show
Compare with: Show
Complemetary
[Notes] [RFC5322]
The set definition is contained in sets.json data file.
sets.json