Auto-reply and sending system emails from your own address

In Settings -> Email channel you can enable an automatic acknowledgement. Write your own subject and body; it is sent once per new ticket, never in reply to an automated message.

There is also a switch that makes EspressoDesk send system emails, such as agent invitations and portal sign-in codes, through your connected mailbox instead of the platform address. Customers then only ever see your domain.

If your mailbox is temporarily unavailable, those system emails fall back to the platform sender so nobody gets locked out. Keep the auto-reply short and tell customers when they can realistically expect an answer.