Weird message from postfix when sending emails to @gmail

[kilburn]

You're lookin in the wrong direction. First of all, there are some previous log entries missing in the mail.log extract you posted. Next, the "Received from 127.0.0.1" header that you don't understand, is probably postfix saying that the message was received from the webmail (although it might also be postfix saying that it has received the message from the antispam, but I can't tell without those missing log entries).

Now, the issue here is that gmail sees postfix connecting from the "86.122.121.252" IP. Therefore, either your server has this IP configured as its main outgoing IP (see "ifconfig") or your server is sNAT'ed to this address. Correct this problem and mails will start to get through...