Serverless and edge runtimes sending email, with SMTP on port 587 from Node runtimes and an HTTP API on port 443 from edge isolates Email Deliverability

Sending Email from Serverless and Edge Functions

Your function returns 200 OK. The log shows no error. The user never receives the email. Or the opposite: the code that worked on your laptop now throws a module resolution error the moment you deploy it, complaining about a package you never imported directly. Both failures come from the same misunderstanding. “Serverless” describes two […]