Send mails individually from Recipients list in "Send email" action

Currently, in the "Send email" action, A4J adds all the mentioned mail recipients to a single mail. If the mail recipients contain one or more 'invalid' email addresses, delivery to all email recipients fails on some SMTP mail servers.

• When Jira needs to send a notification to multiple users, Jira will build 1 email per user, and put this user in the “To:” header of that email, and sends the mail. This will ensure that emails are sent individually and any 'invalid' email address does not affect 'valid' email addresses.
• However, when the A4J action “Send email” needs to send an email to multiple users, this action only builds 1 single email and adds all the users into the “To:” header. This could cause issues with some SMTP mail servers, if 1 single email address is invalid, the whole email is not sent, thereby affecting 'valid' users.

It would be great if A4J feature uses the behaviour of Jira and send separate emails for different mail addresses so that mail to all 'valid' addresses are sent even if the recipient list contains one or more 'invalid' email addresses.