Send email to multiple users in cc

Hi, I am using a deeplink module to create a travel portal. The project has has trip and passenger entity. One trip has several passengers. I wanted to get an email confirmation on passenger using employee id for the trip using the trip id. I want to send e-mail to all the passengers of that trip each time a change has been made. How can I retrieve email ids from all the passengers of that trip? Passenger can be in multiple trips. Thanks in advance for all your help.
2 answers

I’ve just tested Simon Black’s solution, it doesn’t work (maybe 5 years ago it worked like this). 

For people who wonder how to do, you have to put ‘,’ between the email addresses. 


You can send a message to multiple people by separating their emails with a semi-colon: ;. For example;