I migrated my Kopano installation to a new server platform (from SME Server to ClearOS). Same version (18.104.22.168) on both old and new server. The new server was installed from scratch and the data was migrated.
Everything is working as before except I can no longer receive “Infinite Alias” addressed emails. On the old server (qmail) allowed firstname.lastname@example.org to pass to user and Kopano (and Zarafa before that) would process the email to user. I never configured anything for this, it just worked out of the box.
recipient_delimiter = +
Which I changed to this…
recipient_delimiter = -
Now postfix accepts the message but it is getting bounced by Kopano as evidenced here in the dagent log…
Fri Feb 2 10:25:46 2018: [error ]  Failed to resolve recipient email@example.com (0) Fri Feb 2 10:25:46 2018: [error ]  Requested e-mail address "firstname.lastname@example.org" does not resolve to a user.
I have scoured all the config files and have not been able to figure this out, can someone please kindly point me in the right direction?