If the header value contains leading whitespace: ``` Subject: Subject Subject ``` the header canonicalization strips it: ``` Subject: Subject Subject ``` This leads to an (incorrect) failed validation. According to https://www.rfc-editor.org/rfc/rfc6376#section-3.4.5 the leading whitespace should be preserved.
If the header value contains leading whitespace:
the header canonicalization strips it:
This leads to an (incorrect) failed validation. According to https://www.rfc-editor.org/rfc/rfc6376#section-3.4.5 the leading whitespace should be preserved.