Mass email

I plan to tailor the cover letter to each employer but i have heard that the mass mailing thing is a bad idea and I cannot figure out why.

I applied online for a job at target for an hourly job as a cashier. Will they call/email me saying i got the job? Or will i have to go through an interview process? If so, what kind of questions will they ask?

About 2 years ago I was working for a company in sales. Another representative had to split his commission with me because he sold a deal to one of my clients. When he found out he had to split it, he started screaming at me in front of several people which lasted for about 2 minutes. He even made an attempt to lunge at me which was thwarted by other people. I went to HR the next day and reported the incident. He was going to get fired, but I heard through the grapevine that if he did get fired he was going to do something to me. I should have gone to the police at that point but instead I called HR and told them I didn’t want him fired, so they just wrote him up and that was the end of it. To this day I am bothered by the fact I did not get that spaz fired. A few months later I was fired for some total nonesense. What If I were to send an ANONYMOUS mass email now to many people in the company exposing what he did, just to humiliate him?There would be no trace to me. any risk to me?

I need to send out an email to all my co-workers (only been with the company for 2 1/2 months so not everyone knows me) letting them know that I have changed my name (and email has changed) due to my recent marriage. What should I write? Thanks!!
I was told by my boss to send out a mass email, otherwise I would not do so…which is why I really have no clue what to write

group-mail.com