Postfix: Sorry, I couldn't find a mail exchanger or IP address. (#5.4.4)
I am unable to receive e-mails using Postfix. Whenever I try to send a message I get a “Sorry, I couldn’t find a mail exchanger or IP address. (#5.4.4)” reply.
Also, when I looked in my /var/mail/ folder…I noticed that there are no files for any of the user accounts on my server. Instead, all I see are two files “nobody” and “www-data”