For my domain I use an external name server provided by my domain registrar which is forwarding via a A records to the opalstack server. This setup is working fine. In opalstack I now have configured a mailbox and set up an email as described in the documentation. I also have added an SPF record in the DNS management system of my DNS provider. Sending emails is working however I cannot receive any emails in the opalstack mailbox. I think in the past I have always added also MX records but I did not read anything about this in the opalstack documentation - is this not necessary? If not, what else could be missing in my case to make reception possible?
