Wed Jun 22 15:02:10 2011 Info: MID 800 ICID 552832 RID 0 To: <RCPT@DOMAIN.XYZ>
Wed Jun 22 15:02:17 2011 Info: ICID 552832 close
But there is no delivery status, because destination host for domain DOMAIN.XYZ is not reachable (I checked it using telnet IP-of-MX-for-DOMAN.XYZ). My question is, how is it possible to see, that destination host is not reachable (reason of message in queue)? I need this information for customer, how he can see using easy way list of 'problematic' messages in queue. 'showrecipients all' output don't show reason. I'm searching for alternative of 'mailq' (I found only 'showrecipients all', but this answer was from year 2007/8, maybe is something new now). Is there ani GUI possibility how to show messages in queue with his status?
Second question is, I can see only 6 messages in 'showrecipients all' output. What does it mean this output (cutted unnecesary output)?:
In addition to Peter van den Berg's suggestion, I recommend using grep from the CLI to get some more details. Especially if the Delivery Status shows as 'Unknown' or Down'. To do this:
Log into the command line over SSH (preferred), serial, or telnet
Enter the 'grep' command
Enter the number of the mail_logs as show in the displayed list
For the 'Regular Expression' enter the domain name: e.g. DOMAIN.XYZ
For the three questions that follow, simply press Enter to take the defaults.
This will usually produce a lot of output text. Search from the bottom up for lines referring to 'DCID'; these are the related delivery connections. When delivery is failing, these DCID lines will typically show a network error or a rejection from the destination server's side. In most cases this will tell you exactly 'why' the messages for this domain are not delivering.
If it is a network level error: check routing, firewalls, and other network devices as appropriate. If this is happening to multiple domains, I suggest checking your own side first. If this happens to only one domain, you may want to contact their admin first. In some cases you will have to check all devices involved, sometimes even the ISPs in between.
If it is a rejection, it will usually contain a URL that provides additional details. Look at this web page and follow the recommendations as best as possible. Most of these recommendations are considered 'best practice' in the email community anyhow. If you are unable or their feedback does not make sense, follow any directions on their website to engage the rejecting server's admins for further discussion.
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