Learn: email testing & deliverability guides
These guides cover understanding and testing the email your own application sends — signup confirmations, OTP codes, password-reset links, transactional receipts and the scheduled jobs behind them. They explain the authentication checks that decide whether that mail is trusted, why it sometimes lands in spam, and how to verify it before you ship. Perenmail gives you private, persistent inboxes on real domains to point those tests at; these articles are the background that makes the results make sense.
What is email testing?
A plain-language intro to verifying the mail your app sends.
ReadSPF, DKIM & DMARC explained
What each authentication check proves and how alignment ties them together.
ReadDMARC by example
Worked pass/fail scenarios with real record and header snippets.
ReadHow to test email in staging
The two strategies for staging email, when each fits, and a checklist.
ReadEmail deliverability basics
Why mail lands in spam and the fundamentals that keep it in the inbox.
ReadEmail testing checklist
A practical pre-ship checklist for the email your app sends.
ReadLooking for the workflow rather than the theory? Browse the use-case guides for concrete testing scenarios, or check the FAQ for quick answers on how Perenmail works.
Test the email your app sends against a real inbox.
Create a private, persistent inbox on a real domain, point your signup, OTP or transactional mail at it, and inspect exactly what arrives. Free forever, no credit card.