Alrighty...
So here's what's going on.
I can sign in with Outlook to my Mail Server, but when I go to send an email, I get this error. Using SquirrelMail, I don't get any errors, sending works fine. However for obvious reasons, I'm not going to use SquirrelMail.
Some files of potential interest are:
The mail.log:
Mar 20 18:55:56 mail postfix/smtpd[2809]: connect from mail-pd0-f202.google.com[209.85.192.202]
Mar 20 18:55:56 mail postfix/smtpd[2809]: warning: non-null host address bits in "104.236.240.12/24", perhaps you should use "104.236.240.0/24" instead
Mar 20 18:55:57 mail postfix/smtpd[2809]: Anonymous TLS connection established from mail-pd0-f202.google.com[209.85.192.202]: TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)
Mar 20 18:55:57 mail postfix/smtpd[2809]: warning: non-null host address bits in "104.236.240.12/24", perhaps you should use "104.236.240.0/24" instead
Mar 20 18:55:57 mail postfix/smtpd[2809]: NOQUEUE: reject: RCPT from mail-pd0-f202.google.com[209.85.192.202]: 451 4.3.0 <[email protected]>: Temporary lookup failure; from=<33y4KVRgKBRQ08805y-u99C-x8-78D-By95I08805y.w86yD1u7yvyuB.EC@gaia-hosted.bounces.google.com> to=<[email protected]> proto=ESMTP helo=<mail-pd0-f202.google.com>
Mar 20 18:55:57 mail postfix/smtpd[2809]: warning: non-null host address bits in "104.236.240.12/24", perhaps you should use "104.236.240.0/24" instead
Mar 20 18:55:57 mail postfix/smtpd[2809]: disconnect from mail-pd0-f202.google.com[209.85.192.202]
The main.cf
The resolv.conf:
nameserver 2001:4860:4860::8844
nameserver 2001:4860:4860::8888
nameserver 8.8.8.8
nameserver 8.8.4.4
So yeah, I have no idea what's wrong. By the way, the server I'm trying to send mail from is mail.ebear.us, MX records are configured correctly. Running Ubuntu 14.10
Thanks in advance for the help!
postconf -n
andpostconf -M
telnet mail.eibar.us 25
and it already works. No more "Temporary lookup failure" error given