Blog
Notes on testing email.
Practical guides for developers and QA teams: SMTP settings, staging setups, and what to check before an email reaches a real inbox.
SMTP ports 25, 465, 587 and 2525: which one should your app use?
What each port is for, why 25 is usually blocked in the cloud, and the one we recommend.
What to check in a transactional email before it ships
A checklist for HTML, plain text, headers, links and attachments, in the order QA actually works.
Testing password-reset emails end to end
Catch the email in your test suite, pull out the link, and assert the whole flow works.
Plain-text parts: the fallback most teams forget
Why the text/plain part still matters, and how to check yours reads well on its own.
Why we built Mailtarn
How an internal tool at Limenzy became a product for every team that sends email.
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