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Fake SMTP server to test mail-sending

Published : Oct 26, 2022
NOT ON THE CURRENT EDITION
This blip is not on the current edition of the Radar. If it was on one of the last few editions, it is likely that it is still relevant. If the blip is older, it might no longer be relevant and our assessment might be different today. Unfortunately, we simply don't have the bandwidth to continuously review blips from previous editions of the Radar. Understand more
Oct 2022
Trial ?

Using test email accounts or entire test SMTP (Single Mail Transfer Protocol) servers remains a common software testing practice. However, using a real server carries the risk that test emails will be sent to real people and often complicates automated integration testing. We've seen success using a fake SMTP server to test mail sending, which records a request to send an email without actually sending it. Multiple open-source tools exist in this space, including fake-smtp-server, which renders emails in a web UI for visual testing, and mountebank, which exposes the sent emails through a REST API for integration testing. We recommend exploring this technique to reduce risk and improve testing efficiency.

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