Hello,
Apologies for the late reply. Things have been rather busy.
The initial setup of the mailboxes is working. It seems, however, that timeouts or errors occur during regular mailbox checks (IMAP). Every now and then, you can see the mail service restarting.
Perhaps there are too many requests at once, or does the password check take too long (does Server B ‘Mailserver’ check with Server A on every retrieval to see if it’s authorised, or is that only processed on Server B?).
Best regards,
Christian