Content Comparison

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1. NLINK cannot reach SMTP Server
   
   Solution: Make sure the SMTP Server can be reached by NLINK to send emails. 
   
   
   1. Ping the SMTP Server
      Once you have the IP address of the recipient domain’s SMTP server you can now test to see if there is network connectivity between your computer and the SMTP server.
      1. From the command line, run “ping <IP address of SMTP host>”.
      2. Several replies should be received from the SMTP host. If you are unable to ping the SMTP server, there may be a network problem. Alternatively, this may be caused by a firewall configuration that blocks ping commands.
         
         
   2. Send commands to the SMTP Server
      If you have the IP address of the recipient’s SMTP server and you have been able to ping the SMTP server from the NLINK computer you can now test whether you can send commands to, and receive responses from, the SMTP server.
      1. From the command line, run "telnet".
      2. Enter "open <IP address of SMTP host> 25".
      3. Enter "EHLO <client host name>".
      4. You should see "250 OK" from the SMTP server.
      5. Exit telnet by entering “quit”.
         If you can’t send commands to, and receive responses from, the SMTP server, it may be because port 25 is blocked by a firewall.
   3. Use SMTP to forward emails
      In cases where the network infrastructure prevents execution of SMTP queries, NLINK will not be able to act as an e-mail client. In all such cases, specify SMTP Server to which NLINK will forward all emails to.
      
      
2. Outbound Emails fail with 501 Syntax or other errors.
   
   Email cannot be sent, get either one of following errors:
   1. Error delivering e-mail message. Unable to communicate with the SMTP server(s). None of the recipients received the message.
      smtpServer.SomeDomain.com: 501 Syntax: HELO hostname
   2. Error delivering e-mail message. Unable to communicate with the SMTP server(s). None of the recipients received the message.
      smtpServer.SomeDomain.com: Command timed out (10060)smtpServer.SomeDomain.com: Command timed out (10060)
   3. Error delivering e-mail message. Unable to communicate with the SMTP server(s). None of the recipients received the message.
      smtpServer.SomeDomain.com:
      
      

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