I treat everyone's email the same: I don't read it. I may see subject lines but I don't see the technical reason requiring you to read them. If it's a temptation, might want to re-evaluate your own professionalism.
The same with politics and gossip: keep it to yourself; do not participate. If asked a question, smile and decline to comment. Be polite and cordial but trust no one.
Basically: do your job and stfu.