A question of email etiquette

I received an email today from one of our customers. They were sending the same email to a bunch of their suppliers – I know this because they had everyone’s email address in the TO field! Aaagh! I cringe when I see this sort of thing – especially from a business.

So, I am wondering, should I send a polite reply email informing them of the security risk in plopping everyone into the TO field and with instructions on how to use the BCC field? Or should I just let it slide?

Tink 🙂