On Monday, March 16, 2020 5:54:02 AM EDT Burn Zero wrote: > Hi, > > I have configured an internal postfix server where users will use that as > relay servers to relay emails to outside and internal users. > > I have restricted postfix to allow only one domain as MAILFROM and deny > rest all. But how to restrict From address like this? Is there any way in > postfix?
It's out of scope for postfix itself to do that, but vrfydmn [1] does exactly that and can be added to your postfix configuration. Scott K [1] https://github.com/croessner/vrfydmn
