Originally Posted by till
Is ubuntu.elatia.net listed in /etc/postfix/local-host-names? If not, add it at the end of the file and restart postfix.
Well, I've looked at that a bunch of times and the answer is technically, no. However, there was something similar so I didn't think it was an issue... I don't know what the .localdomain thing does. Here is the file:
I'll try putting just ubuntu.elatia.net below that.