Splunk Search

Postfix mail delay subsearch

masterpipo
New Member

I need to correlate the delays in mail handling in postfix logs to the sender address. As you know, the line in maillog that holds the delay field is different from the one that holds the from address. I need results something similar to the one below:


| sender address | number of mails delayed | maximum delay |


Since the common values in the mails is the postfix queue id, it's very difficult and can contain a lot of subsearches. I can only correlate 2 of the 3 required fields using 1 subsearch (if delay>60, pass the queue_id to the search on top. I can then get the amount of mails delayed). But correlating the 3rd field is a bit too difficult for me.

Any help is appreciated!

EDIT
I think I got it! Used transaction command to place the fields together and then it sort of worked 🙂

0 Karma

masterpipo
New Member

index="index" host="machine" | rex field=_raw "[^:]+:[^:]+:[^:]+: (?\w+):" | transaction qid keepevicted=true | stats max(delay) by field | sort desc delay | join field [search index="index" host="machine" [search index="index" host="machine" delay>60 | dedup queue_id | fields queue_id] field=* | top field | fields field count]

here's what I got. Hope this helps someone

0 Karma

jonuwz
Influencer

Post some example logs.

0 Karma
Got questions? Get answers!

Join the Splunk Community Slack to learn, troubleshoot, and make connections with fellow Splunk practitioners in real time!

Meet up IRL or virtually!

Join Splunk User Groups to connect and learn in-person by region or remotely by topic or industry.

Get Updates on the Splunk Community!

Why Splunk Customers Should Attend Cisco Live 2026 Las Vegas

Why Splunk Customers Should Attend Cisco Live 2026 Las Vegas     Cisco Live 2026 is almost here, and this ...

What Is the Name of the USB Key Inserted by Bob Smith? (BOTS Hint, Not the Answer)

Hello Splunkers,   So you searched, “what is the name of the usb key inserted by bob smith?”  Not gonna lie… ...

Automating Threat Operations and Threat Hunting with Recorded Future

    Automating Threat Operations and Threat Hunting with Recorded Future June 29, 2026 | Register   Is your ...