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I am trying to send email from linux (Ubuntu v14), some email addresses it works, and some it's not, and I am completely lost. I am not a linux guy so it's kind of all new to me.
Here's the log from /var/mail/root http://pastebin.com/h4yuA3Rf
I think it might be because I added a MX record for 123reg website because one of the domains wasn't receiving email (or sending, I forget)
Any help would be appreciated