3 different people in my company need to send the same email every time there is someone new.
What's the best way to send this email using Gmail?
From what I saw, they need to give me their passwords. Is there a better way?
Yes, there is. If you write a program and it has a configuration file, then the email address can be defined in the configuration file. You can then hand over the program to the others, who will use it on their own, changing their credentials in the configuration files.