Dear all
I have a question about relaying. As I understand it, relaying is achieved by using more than one SMTP server to send/forward mail to its final destination.
We are using the Mercury E module to send mail which tries to connect directly to the destination SMTP server and then delivers the mail.
During the last couple of days, from one address, we are getting 550 relaying denied error messages.
Here is the Mercury E log:
15:31:12.234: --- Thu May 08 15:31:12 2008 ---
15:31:12.234: Connect to '62.172.185.25', timeout 60.
15:32:13.234: 8: Socket read timeout
15:32:13.234: --- Connection closed normally at Thu May 08 15:32:13 2008. ---
15:32:13.234:
15:32:13.250: --- Thu May 08 15:32:13 2008 ---
15:32:13.250: Connect to '62.172.185.42', timeout 60.
15:33:14.250: 8: Socket read timeout
15:33:14.250: --- Connection closed normally at Thu May 08 15:33:14 2008. ---
15:33:14.250:
15:33:14.250: --- Thu May 08 15:33:14 2008 ---
15:33:14.250: Connect to '80.6.93.157', timeout 60.
15:33:15.250: >> 220 THIS IS A MAIL SERVER<cr><lf>
15:33:15.250: << EHLO apsarchaeology.co.uk<cr><lf>
15:33:15.312: >> 250 Requested mail action okay, completed.<cr><lf>
15:33:15.312: << MAIL FROM:<greenman@lincsheritage.org><cr><lf>
15:33:15.359: >> 250 Requested mail action okay, completed.<cr><lf>
15:33:15.359: << RCPT TO:<blueman@lincolnshire.gov.uk><cr><lf>
15:33:15.406: >> 550 Relaying denied.<cr><lf>
15:33:15.406: << QUIT<cr><lf>
15:33:15.437: >> 221 Closing connection.<cr><lf>
15:33:15.437: --- Connection closed normally at Thu May 08 15:33:15 2008. ---
15:33:15.437:
I don't understand where the relaying is coming into it. Is it due to the lincsheritage.org mail being sent from apsarchaeology.co.uk? If so, then I thought that this had been solved when we configured the RDNS to resolve apsarchaeology.co.uk to our permanent IP address and back again.
Previously, mail to this address has been accepted (for years). Can anyone shed any light on what is happening here please?
Many thanks.