Hey guys, I need some urgent help from you all. We are running SBS 2003 Premium machine with Service Pack 1 and Exchange SP1 installed. In this scenario Exchange sends mail via DNS, and receives mail using an SMTP de-queuing facility from my ISP‘s global mailbox. All this was working fine until 3 days ago but since then we are not able to either receive or send mails any more.
We checked the event viewer and it shows many entries for 7002 and 7004 errors. Clicking on 7004 says:
"This is an SMTP protocol error log for virtual server ID 1, connection #6. The remote host "xxx.214.129.136", responded to the SMTP command "xexch50" with "504 Need to authenticate first ". The full command sent was "XEXCH50 1028 2 ". This will probably cause the connection to fail."
And 7002 says:
This is an SMTP protocol warning log for virtual server ID 1, connection #1256. The remote host "xxx.82.248.45", responded to the SMTP command "rcpt" with "421 Service Temporarily Unavailable ". The full command sent was "RCPT TO:<andkin@s2f.com.au> ". This may cause the connection to fail.
Any help will be appreciated.
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