Inherited from Serializable
Inherited by implicit conversion any2stringadd from
Subject to any2stringadd[Subject]
Inherited by implicit conversion StringFormat from
Subject to StringFormat[Subject]
Inherited by implicit conversion Ensuring from
Subject to Ensuring[Subject]
Inherited by implicit conversion ArrowAssoc from
Subject to ArrowAssoc[Subject]
RFC 5322 3.6.5
The informational fields are all optional. The "Subject:" and "Comments:" fields are unstructured fields as defined in section 2.2.1, and therefore may contain text or folding white space.