Hello Marco, Looking at the code, if a domain is in imapd.conf’s calendar_user_address_set, then invitations within that domain within Cyrus IMAP are delivered over the Scheduling Inbox, and not by sending email. I think the default for this setting is the defaultdomain parameter, not the servername value, as stated in the documentation. Greetings // Дилян -----Original Message----- From: Marco Moock <mm@xxxxxxxxxx> Reply-To: Info <info@xxxxxxxxxxxxxxxxxx> To: info@xxxxxxxxxxxxxxxxxx Subject: Re: mail address selection for calendar event planning Date: 22/09/24 11:39:06 Am 22.09.2024 um 11:22:58 Uhr schrieb Дилян Палаузов: > Look also at the calendar_user_address_set parameter. The description is rather generic. What does this setting do? ------------------------------------------ Cyrus: Info Permalink: https://cyrus.topicbox.com/groups/info/T005e37dde3985398-Mf3c441117c9a3c8f80b86ed6 Delivery options: https://cyrus.topicbox.com/groups/info/subscription