These are the messages apowerb sends on its own behalf — not the mail an agent
sends through a connected mailbox, which belongs to
Microsoft or Google.
Variables
The checklist looks at the first three. A relay that needs authentication but
gets none will refuse the message at send time, not at startup.
Without SMTP the mailer is simply off: one log line, no error. Sign-up still
works as long as AUTH_EMAIL_VERIFICATION_ENABLED is false — which it is by
default. Turn verification on and the accounts of an installation with no
relay are stuck unverified, which is why the checklist names this capability.
Check
Trigger a password reset from the sign-in screen and read the backend logs. A
line naming the relay means the message left; the absence of any line means no
mailer was configured.
APP_PUBLIC_URL pointing at localhost produces links that work on the
server and nowhere else — the classic « the mail arrived but the link is
broken ».
