Can the following header:
Content-Type: multipart/mixed; boundary="abcedfghiu"
be folded in the following way:
content-type: multipart/mixed; bounary="abced
That is to say can the value in parameter"="value be
Technically the answer is no, it can't. RFC822 allows breaks only at LWSP,
and the syntax of the boundary parameter doesn't include any.
However, since there are cases of very broken header folding out there I
strongly recommend that you implement something sensible to accomodate this
Same question applies to a header like: