Alex: > Hi, > > I'm using postfix-3.5.7 on fedora32 on a server with four IP addresses > (mail1, mail2, etc) on one interface. The problem is that all mail > goes out the IP associated with the actual interface, not the virtual > ones, which I believe is causing SPF to fail. > > Is this a Linux problem?
No, this is a configuration problem. > Would I have to have multiple instances of postfix running to be able > to control which IP is used for which domain? Give each instance its owninet_inteerfaces setting. This is covered in http://www.postfix.org/BASIC_CONFIGURATION_READNE.html Wietse