4f4f4fugugugugflagsdate.sentdate.receiveddate.savesize.virtualsize.physicalimap.bodyimap.bodystructureimap.envelopepop3.uidlpop3.orderguidmime.partsbinary.partsbody.snippethdr.Fromhdr.Message-IDhdr.Subjecthdr.Date BMessage-Id: CSubject: Mail delivery failed: returning message to sender MFrom: Mail Delivery System LFrom: Mail Delivery System ?Message-Id: <4Wz52D6Jqvz3198@shared.jellyfish.systems> 5Subject: Undelivered Mail Returned to Sender MFrom: Mail Delivery System BMessage-Id: CSubject: Mail delivery failed: returning message to sender