How to interpret errors reported in the SMTP Debug Log File when sending to a remote server/domain. MailEnable SMTP Debug and Activity Logs can be found in the following default location: C:\Program Files\Mail Enable\Logging\SMTP.
When mail is sent by MailEnable to remote SMTP
Servers, there are two major steps that the server takes. Firstly, it determines
who to send to (via a DNS Lookup) and secondly it attempts to connect to the
server and send the data.
Note: A tool for analysing these files can be downloaded from HERE. This tool allows you to correlate errors in your debug log with SMTP Transactions recorded in your Activity logs.
|Domain [ Domain Name ] has MX list [ Mail server 1 , Mail server 1 ]||This indicates that outbound mail is being resolved to MX records and therefore that the DNS server appears to be functioning correctly.|
|DNS Server could not resolve domain name ( Domain Name ) as it does not appear to be registered.||If this entry appears in the log file then the DNS Server did not return MX records for the requested domain.|
|DNS Server could not resolve domain name ( Domain Name ) in a timely fashion. Check DNS Server settings.||If this entry appears in the log file then the DNS Server could not be contacted. This usually means that an invalid DNS server has been specified, or the DNS Server could not be reached or it is offline.|
|DNS Server could not resolve domain name ( Domain Name ) as it is invalid name.||If this entry appears in the log file then the DNS Server did not return any records for the specified domain. This indicates that the domain name is misspelt or there is a problem with the DNS Server.|
|Communications Error: Socket connection||A firewall may be blocking access to the remote server or the remote host is offline.|
|Communications Error: Could not populate sockets address pack.||Either your Network Adapter DNS Settings are invalid or there is a DNS configuration with the remote server's MX record where the MX record could not be equated to an IP Address (A Record).|
|Mail server for domain name could not be resolved. We will keep trying and notify you if we are unable to deliver the message.||If you see an error as follows, then the remote server refused your connection request, you are on a blacklist or the remote host was offline. To check if you are on a blacklist, please see www.dnsreport.com or www.dnsstuff.com.|
Which DNS Server should be used with MailEnable?: Article ME020055
Windows DNS Server Response Codes: Article ME020055
Checking DNS records: http://www.dnsreport.com
How to troubleshoot SMTP Connectivity issues and Analyse Log Files: Article ME020170
|Product:||MailEnable (All Versions)|
|Class:||INF: Product Information|
|Created:||12/06/2003 1:07:00 AM|
|Revised:||Wednesday, May 4, 2016|