This is a post about how I had a bug in a background job that ended up sending huge emails to customers. Learn about how I found & debugged the issue, mitigated the problem, and then finally fixed the underlying causes. Previous title was “Sending Massive Emails Considered Harmful”. It was a quiet day in July when I got a message from SendGrid about a service I run, CodeTriage, which helps people
Almost every application I ever worked on had some requirement to send emails. Whenever I need to implement sending emails (using Action Mailer), I also implement a background job for it. Since version 4.2, Rails has built-in support for executing background jobs using Active Job. Every time I need to start setting up Active Job for email sending, I find myself looking up the required syntax and s
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