Zimbra Resource Accounts

You can send mail (SMTP) as the resource, like from a copier for scan-to-email.

zmprov ma existing.account@yourdomain.tld +objectClass zimbraCalendarResource displayName "MyDeviceName" zimbraAccountCalendarUserType RESOURCE zimbraCalResType Equipment

then flush the account cache:

zmprov fc account

zmprov ma account@yourdomain.tld zimbraPasswordMaxAge 0