See METHODS in Mail::Reporter
You cannot create a delayed header with fields.
A delayed message header cannot contain any information, so cannot be build. You can construct complete or subset headers.
Get the information about the header line $name. Realization will take place.
On a delayed head, this retuns undef
, because when there is no header
there is also no body.
For messages in directory or network organized folders, Mail::Message::size() usually will give a figure for the whole message without much cost. Subtract a few hundred bytes for the header, and you will get a good estimate.
Make a guess about when the message was originally posted.
On a delayed head, this returns undef
.
For messages in directory or network organized folders,
Mail::Message::timestamp() usually will give a figure without much cost.