Sending Mail to group of email addresses at once

Hello there,

I have a contact entity that has multiple email fields (Max 5).

My scenario is  to send email to all those emails associated with the record at once.

For example:-

if a Contact named "XYZ" has 5 emails and if i send email to "XYZ" , the emails must be sent to all his email addresses.

may i know how this could be achieved? and the methods? :)

Instructions | Links | Etc would be helpful

Thanks once again :)