Admin Panel / People / E-mail

SMTP and two account settings. One Save, below everything it writes.

• SMTP — host, port, username, password, TLS and the from address. On most installs these are configured by environment variables instead, and the fields are commented out of the pane; MAIL_URL / MAIL_FROM are what WeKan then uses.
• Email domain allowed to invite people, when self-registration is disabled (mailDomainName) — this does not limit who may sign in. A non-admin whose address ends with this domain may send board invitations, and only while self-registration is off (admins may always invite). It is a plain suffix match, so write it as @example.com; example.com alone would also match [email protected].
• Allow Email Change — whether a user may change their own e-mail address.

Send SMTP test email sends one to your own address and reports what happened.

Related

• E-mail troubleshooting
• Domains — which domains are actually in use.