I have seen a few times that a contact could have N different email adresses. This is common when a customer has N products related to them and has a different email address related to each product. Sometimes these products are too many or continually changing, making it impossible to save these emails in the contact fields.

The solution applied usually depends on the creation of contacts or leads by email address, which increases expenses.

A tool that would allow emails to be sent to these email addresses stored in 1:N related entities with some filters set would be great.