I do not find any guidelines regarding how to configure multiple IPs into an SPF record. So far I used (for example):
v=spf1 ip4:180.72.100.0/24 a mx ?all
But now I should add another range of IPs that are allowed, e.g.
v=spf1 ip4:180.72.100.0/24 ip4:180.20.111.0/24 a mx ?all
Is the second syntax correct? Thanks.
The open SPF wizard from the previous answer is no longer available, neither the one from Microsoft.