Hosting accounts are currently being migrated between astro and bora.
If you hosting account currently resides on astro you may need to update your email settings to reflect this move.
Any references to:
astro.mkndns.net
Should be replaced with:
mail.yourdomain.com
(replacing yourdomain.com with your actual domain name).
As always, if you have any questions please let us know via hello@marken.com.au.