Hello!
I have a problem where mails can be sent and delivered to a contact directly but not when the contact is a part of a distribution group with it's own adress.
I have allowed mails to be delivered both internally and externally and I have ran out of options and therefor consults this forum.
The email adress for the contact is a subdomain adress in the following format: "adress@subdomain.maindomain.se"