Good afternoon Everyone,I was wondering if you could please help me a user on my domain is having the following issue"Your message did not reach some or all of the intended recipients. Subject: Test email Sent: 25/03/2008 10:51 AMThe following recipient(s) could not be reached: amatthews@learningfast.com.au on 25/03/2008 10:51 AM You do not have permission to send to this recipient. For assistance, contact your system administrator. <neatoms.NEATO.com.au #5.7.1 smtp;550 5.7.1 <amatthews@learningfast.com.au>... Relaying denied. IP name possibly forged [203.49.252.252]>"The 203.49.252.252. is a ISP address. Could you please help?Thanks,Richard WeaverNeato Employment Services rweaver@neato.com.au

Is 203.49.252.252 your ISP? Are you forwarding email through that ISP or directly to the Internet? In either case, some email server is generating a 550 error along the path to your destination. So I can my own test. I did an MX record lookup for the domain learningfast.com.au. I found that "mail.stabat.com" is the primary MX record for that domain name. Using a command link mailer I tried to connect directly to the server. Below are the results: C:\postie>postie -host:mail.stabat.com -to:amatthews@learningfast.com.au -from:richard_neato@neato.com.au -s:test -msg:test -gmtCould not send: error= -1Status: 450 <amatthews@learningfast.com.au>: Recipient address rejected: Greylisted for 300 seconds (see http://isg.ee.ethz.ch/tools/postgrey/help/learningfast.com.au.html) This means that the mail server that is designated as the place to go for mail to @learningfast.com.au is saying the email address you are trying to use doesn't exist. So if I was to guess, you are handing email off to your ISP's SMTP relay, and they are trying to deliver it for you. However they are running an older version of a SMTP mailer, and when they try to deliver the message for you they get the 450 error along with the additional text, and don't interpret it correctly. So in turn the NDR the message back to you with a slightly different error message. Either way you should always use a direct connection to the end node's SMTP mail to rule out any issues with inbetween ISP SMTP relays when you a diagnosing a problem. Good luck!

Thank you very much we fixed the issue was in our mail server. Thanks for your time Hotfix

What did you do to fix the issue? Also could you mark this thread as answered?