$rfc5322:obs-qp-char
[\u0000-\u0008\u000A-\u001F\u007F]
[\x00-\x08\x0A-\x1F\x7F]
Test a string: Show
Compare with: Show
Complemetary
[Notes] [RFC5322]
The set definition is contained in sets.json data file.
sets.json