Mailfilter.dynamic.net / .com is being migrated which may cause brief outages for some customers who do not have a secondary mx record pointing to backupmail.dynamic.net / .com. Most customers should continue sending/receiving mail without so much as a hiccup. Please open a ticket with us at tickets.dynamic.com if you do experience any email issues. This maintenance window is from Dec 16 @ 1:30pm – 3:30pm PST.

Thanks,
Your Dynamic Support Team