postmoogle/docs/mailboxes.md

Mailboxes configuration

POSTMOOGLE_MAILBOXES_RESERVED

Space separated list of reserved mailboxes, example:

export POSTMOOGLE_MAILBOXES_RESERVED=admin root postmaster

Nobody can create a mailbox from that list

POSTMOOGLE_MAILBOXES_ACTIVATION

Type of activation flow:

none (default)

If POSTMOOGLE_MAILBOXES_ACTIVATION=none mailbox will be just created as is, without any additional checks.

notify

If POSTMOOGLE_MAILBOXES_ACTIVATION=notify, mailbox will be created as in none case and notification will be sent to one of the mailboxes managed by a postmoogle admin.

To make it work, a postmoogle admin (or multiple admins) should either set !pm adminroom or create at least one mailbox.