class Net::IMAP::Envelope

Returned by FetchData#envelope
Net::IMAP@Message+envelope+and+body+structure for other relevant RFCs.
for full description of the envelope fields, and
and [IMAP4rev2 §7.5.2]
See [IMAP4rev1 §7.4.2]
messages when the message is malformed or a draft message.
invalid for well-formed [RFC5322]
return the same value as #from. Also, fields may return values that are
When the #sender and #reply_to fields are absent or empty, they will
[Note]

Net::IMAP::Envelope represents envelope structures of messages.