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Huge SMTP logs since update to 8251
Problem reported by Paul White - 8/16/2022 at 9:06 AM
Submitted
I installed the latest Smartermail Update Build 8251 a few days ago.  Ever since then my Log files are HUGE!
Just yesterday my SMTP log file was 4.5GB.   Granted I know this was a Monday, so there would be increased usage, but when compared to last Monday ( 105 MB ) this is  a huge increase.
I am downloading the Log from the 15th Now, to look at the lines in a text editor to see what the additional data is.  This is causing some performance issues on my server, as I have some scripts setup to parse the SMTP logs every minute and look for brute force attempts and then firewall said IPs.   Any ideas?

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Kyle Kerst Replied
Employee Post
I checked our SMTP logs in a couple of live environments we have in-house and didn't see any exponential growth in ours so my bet is there is likely something happening simultaneously and the timing is likely coincidence. Very curious to see what the bulk of the extra log traffic is! 
Kyle Kerst
Technical Support Specialist
SmarterTools Inc.
(877) 357-6278
www.smartertools.com
0
Paul White Replied
I have an email blast scheduler setup to send about 8000 messages at 5am.  Most systems I run, I have upgraded to queue the messages to the DB server, then a separate script picks up a few messages from the DB, and sends them on through smartermail every minute.  This helps to trickle out the messages and not over load the receiving servers.  On this particular system it was not upgraded to queue the messages, and instead just forced all 8000 messages through smartermail as fast as possible.  When I looked at the Logs,  90% of the lines in the SMTP logs looked like this ( have changed the ip, domain and Alias for privacy reasons)

05:06:53.552 [1.2.3.4][62213893] senderEmail(2): news@mybusiness.com parsed using: "My Businesss" "><news@mybusiness.com>

From 5:00 AM through 6:45AM there are about 30 million lines that all look like that.
I have since updated the code in my application to queue the messages, before trickling them on to smartermail.
Hoping that resolves the issue, but still never had this issue before upgrading to the latest version of smartermail.


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Kyle Kerst Replied
Employee Post
Interesting finds! That definitely sounds like our source of trouble there. I think we added some additional logging details recently but I'm not aware of anything in this area specifically that would impact the log sizes. Is it possible the first attempts failed and so it retried, adding to the amount of log entries for this session? If you can submit a ticket on this one I'd be happy to take a look and make sure there isn't anything deeper going on for you. 
Kyle Kerst
Technical Support Specialist
SmarterTools Inc.
(877) 357-6278
www.smartertools.com

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