A-Z mail
Mail from beginning to end
A-Z mail whether fresh or stale can succeed or fail.
La-z-mail
The act of emailing someone within earshot, eg: a person sitting next to you at work, when it would be easier to just speak about the subject.
“Al, stop clogging my inbox with la-z-mails and get your arse over here if you want to request a Def Leppard song”