Your mail is getting graylisted... it is being rejected with a temporary failure code. Your mail server should keep the e-mail in queue and retry delivery later. Eventually, it should succeed, because greylisting is a temporary condition... It is a SPAM-prevention technique to test if you are a legitimate sender and not a spambot.
More info here: http://en.wikipedia.org/wiki/Greylisting 2015-05-14 4:14 GMT+02:00 Tim Dunphy <bluethu...@gmail.com>: > > Hey guys, > > I'm trying to send email from a monitoring host I setup in amazon ec2. And > the mail from this host keeps getting rejected. This is what I have in the > logs when I try: > > May 14 02:09:24 mail postfix/smtpd[16654]: NOQUEUE: reject: RCPT from > ec2-52-4-204-96.compute-1.amazonaws.com[52.4.204.96]: 450 4.2.0 < > nag...@jokefire.com>: Recipient address rejected: Greylisted, see > http://postgrey.schweikert.ch/help/jokefire.com.html; from=< > bluethu...@monitor1.jokefire.com> to=<nag...@jokefire.com> proto=ESMTP > helo=<monitor1.jokefire.com> > > > How can I fix this problem? > > Thanks, > Tim > > > > -- > GPG me!! > > gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B > >
