nixCraft

I am running postfix on freebsd and anytime I try to send email out through Outlook I get an relay access denied 554. I anc recieve email just fine I can even use the webmail client to send email out. This just started happening about two days ago. I haven't been editing any files. I recently had to take over email administration duties. I made sure the username and password are correct in Outlook and this is happening to other users as well. The mynetworks contains my local network. Does it matter that the main.cf.bak is configured instead of the main.cf. I am a little rusty on postfix and freebsd.

Noop, postfix always use main.cf.

Postfix allows smtp relaying from users in your "mynetworks" directive only. Make sure mynetworks contains both localhost and your subnet.

Make sure permit_mynetworks is configured properly. For example here is how mynetworks looks:

So all clients 192.168.1.0/24 would be able to send emails

The permit_mynetworks is that something that I just uncomment or do I have to add that in the main.cf. Where would the permit_mynetworks be located in the main.cf

Hi!

If you allow your host (MTA) to act as an SMTP relay, you need to configure the relay options as follows:

# Allow local and remote network to relay through this machine (at least it working for me)
Just add or make correct changes to above line and restart postfix.

ALSO note that conifg is diffrent for virtual domains.. are you config virtual domains??