[Gaffer]

Papers and effects covers emails and phone conversations

Emails, and documents written on government computers, or from personal accounts conducting official business aren't 'private'. Neither are phone conversations over government telephone accounts.

[MrB]

IIRC, it is illegal, or at least a fireable offense, to use personal emails to conduct gov’t business,

because, inherently, such use is intended to avoid scrutiny of things that need scrutinized.