Email Problem

I know this trick and have used it in the past for testing. However when revisited my postfix configuration some days ago, I removed it as it didn't seem to cause any good (or any harm though, but I was playing around).

I have added it back now to see if the situation have changed. However to me it used to work fine without it (that's why I didn't report it).

Something that could have clearly caused troubles is to have as a co-domain (or as a vhost itself) the same name with postfix's host. But this is not the case above so I'm out of tricks here...

 

I hope someone comes up with a solution. I myself have temporarily gone with a different setup. I do not wish to stick with this setup, but it will work for now. I will probably try again in the near (or not-so-near) future, but I was sick of all the emails, and not being able to take care of it. I want to thank you guys (and/or gals) for your help. I really do appreciate it. If, when I redo this setup, the problem continues, I will definitely let you all know. For all I know, it could have been caused somehow with my hardware (don't ask me how, I'm a web-programmer, not a hardware guy, lol).

Once again, thank you for all your help!!!