On 12/01/2019 21:58, Nick Howitt wrote: > > > On 12/01/2019 16:42, @lbutlr wrote: >> On 12 Jan 2019, at 07:52, Nick Howitt <n...@howitts.co.uk> wrote: >>> Unfortunately I don't have access to the MX Backup service. It is >>> provided by my DNS provider. >> Honestly, you should not have an MX server outside of your control. >> >> If your server is routinely down for several days, then you shouldn't >> be running your own server. >> > OK. Let's assume I don't have an MX Backup. Then all 30k+ attempted > spam deliveries would have come straight to me. They would all have > failed, initially because of unknown recipient, then, when I added > them to the access list, because of an denied sender. What is the most > efficient way of blocking these messages? Can they be blocked earlier > than smtpd_sender_restrictions?
In your specific case I would have just let them reject based on unknown recipient (if they get past postscreen and rate limitng, when they are in use). It doesn't require maintenance of access files unless you plan to auotmate that. John
