Action Mailbox is the second brand new framework coming to Rails 6 (the first was Action Text). It serves to route incoming emails to controller-like mailboxes for processing in Rails. It ships with ingresses for Amazon SES, Mailgun, Mandrill, and SendGrid. You can also handle inbound mails directly via the Postfix ingress. The inbound emails are turned into InboundEmail records using Active Recor
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