I've been banging my about this for so long I'm sure I'm just going round in circles.
I have an exchange 2003 Server emails appear to get stuck in the queue.
I have run smtpdiag and this is the output I get:
Searching for Exchange external DNS settings. Computer name is ******-SERVER. VSI 1 has the following external DNS servers: 18.104.22.168 Checking SOA for ****construction.com. Checking external DNS servers. Checking internal DNS servers. SOA serial number match: Passed. Checking local domain records. Checking MX records using TCP: ******international.com. Checking MX records using UDP: ******international.com. Both TCP and UDP queries succeeded. Local DNS test passed. Checking remote domain records. Checking MX records using TCP: ****construction.com. Checking MX records using UDP: ****construction.com. Both TCP and UDP queries succeeded. Remote DNS test passed. Checking MX servers listed for *@****construction.com. Connecting to mail.***construction.com [81.***.2*8.1*4] on port 25. Failed to receive data. Error: 10054 Error: Expected "250". Failed to get a response from the server. Failed to submit mail to mail.asemconstruction.com.
I keep getting Error:10054 no matter what email server I try to send to.
If however I telnet into a mail server it works perfectly fine and I get no errors
This is doing my head in!
Any help would be greatly appreciated.