Software Portal error when sending emails: Mailbox unavailable. The server response was: 5.7.60 SMTP; Client does not have permissions to send as this sender
Article ID: 170247
Software Management Solution
The FROM address specified did not exist as a mailbox.
Set an address that exists as a mailbox in the system.
- Browse under Settings > Software > Software Portal Settings > and select Software Portal Settings.
- Under Email notification settings, under the common e-mail address:, set an address that exists and has a mailbox.
that you need to do this even if you choose the option "Sender's individual e-mail address (if defined).