Want to see the server handle a real message end-to-end? Send anything to the address below and watch STARTTLS, SPF, DKIM, and DMARC all pass live.
openssl s_client over port 587 · full EHLO / AUTH LOGIN / MAIL FROM cycle
Raw header inspection of a delivered test message
Landed in the primary inbox — flagged important, standard TLS encryption confirmed
Full deliverability sweep — blacklist, auth, content & server checks