my $delayed = Mail::Message::Head::Delayed->new(...) $delayed->isa('Mail::Message::Head') # true $delayed->guessBodySize # undef $delayed->isDelayed # true
See SYNOPSIS in Mail::Message::Head
This object is used as place-holder, to be replaced by a Mail::Message::Head when someone accesses the header of a message.
See DESCRIPTION in Mail::Message::Head
See Ordered header fields in Mail::Message::Head
See Head class implementation in Mail::Message::Head