How to handle incoming emails with multiple large attachments from a Rails application?

If your main concern is about loading rails environment every minute to run the script, I would suggest mailgun along with some cron alternatives.

I wrote a blog post about a number of possible options for receiving email in Rails. The cron approach works but but there can be a number of issues if the processing takes longer than your suggested 5 minutes and your then spinning up another instance whilst the old one is still going.

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