On Tue, May 19, 2020 at 05:10:33PM +0200, Rainer Dorsch wrote: > Just curious, if I have multiple MX records, how would you sync the incoming > emails (*) ? I can see with an NFS mounted home directory with Maildir > mailboxes that could work and dovecot could probably run on multiple hosts > (or > at least it would be possible to switch the imap DNS entry if needed). But > then the NFS server is the single point of failure. Are there better ways to > sync the mail servers behind the MX records than NFS?
You're assuming the secondary MX performs actual local deliveries. That's not normally the case. A secondary MX usually just queues up the messages for SMTP delivery to the primary MX.
