On 10/3/23 23:52, Henning Follmann wrote:
Well "could" is the best way to describe the chances of this working.
I think the best way too find out:
Check if the ISP will allow you to set the reverse DNS record matching
your chose A record.
If they do, GREAT! If they don't, you most likely will not be happy in the
long run.
All you need to do is generate an SPF record authorising your fixed IP(s) to send mail for your domain(s).
You don't need need to have control over the forward and reverse DNS of the IPs, but it is pretty much required that your ISP has forward and reverse entries for them.