Random thought: never send email to “all your contacts”
I just received an announcement of an event from someone whose name I didn’t recognize. I use special email addresses for special occasions so I can often tell where someone got my address. In this case, the person was emailing me using the address I had used to hire someone last Fall. I then did a search on her name and confirmed that the only time we’d been in touch was regarding the job application process.
It is never a good idea to send an email to everybody in your contact list no matter the email. This would be one example why. There are people on that list whom you don’t actually know. Just because you exchanged one email with someone months (if not years) ago does not mean that you are now buddies and should be exchanging messages.
Needless to say, the incredibly poor judgement to use cc instead of bcc in such a case is just the icing on the cake (or would that be the.. well, I’ll refrain from offering alternatives, you can use your imagination…).