EXCHANGE   Exchange – “453 4.3.1 Insufficient system resources”



Today some users have reported an issue with emails that have been received with hours of delay

I've traced one of the emails on my Ironports and I've seen the following…

......
15 Dec 2015 13:29:38
(DCID 1061887) Delivery started for message 578750 to user@maildomain.com.
15 Dec 2015 13:29:38
(DCID 1061887) Message 578750 to user@maildomain.com delayed. Reason: 4.3.0 - Other mail system problem ('452', ['4.3.1 Insufficient system resources']) []
15 Dec 2015 13:29:38
Message 578750 to user@maildomain.com pending until Tue Dec 15 13:31:42 2015 as per bounce profile Default.
15 Dec 2015 13:31:43
(DCID 1062464) Delivery started for message 578750 to user@maildomain.com.
15 Dec 2015 13:31:43
(DCID 1062464) Message 578750 to user@maildomain.com delayed. Reason: 4.3.0 - Other mail system problem ('452', ['4.3.1 Insufficient system resources']) []
15 Dec 2015 13:31:43
Message 578750 to user@maildomain.com pending until Tue Dec 15 13:37:58 2015 as per bounce profile Default.
15 Dec 2015 13:37:59
(DCID 1064550) Delivery started for message 578750 to user@maildomain.com.
15 Dec 2015 13:37:59
(DCID 1064550) Message 578750 to user@maildomain.com delayed. Reason: 4.3.0 - Other mail system problem ('452', ['4.3.1 Insufficient system resources']) []
15 Dec 2015 13:37:59
Message 578750 to user@maildomain.com pending until Tue Dec 15 13:56:46 2015 as per bounce profile Default.
15 Dec 2015 13:56:46
(DCID 1065046) Delivery started for message 578750 to user@maildomain.com.
15 Dec 2015 13:56:46
(DCID 1065046) Message 578750 to user@maildomain.com delayed. Reason: 4.3.0 - Other mail system problem ('452', ['4.3.1 Insufficient system resources']) []
15 Dec 2015 13:56:46
Message 578750 to user@maildomain.com pending until Tue Dec 15 14:53:10 2015 as per bounce profile Default.
15 Dec 2015 14:53:13
(DCID 1065946) Delivery started for message 578750 to user@maildomain.com.
15 Dec 2015 14:53:13
(DCID 1065946) Message 578750 to user@maildomain.com delayed. Reason: 4.3.0 - Other mail system problem ('452', ['4.3.1 Insufficient system resources']) []
15 Dec 2015 14:53:13
Message 578750 to user@maildomain.com pending until Tue Dec 15 15:53:13 2015 as per bounce profile Default.
15 Dec 2015 15:53:13
(DCID 1067574) Delivery started for message 578750 to user@maildomain.com.
15 Dec 2015 15:53:13
(DCID 1067574) Message 578750 to user@maildomain.com delayed. Reason: 4.3.0 - Other mail system problem ('452', ['4.3.1 Insufficient system resources']) []
15 Dec 2015 15:53:13
Message 578750 to user@maildomain.com pending until Tue Dec 15 16:53:13 2015 as per bounce profile Default.
......

So it seemed Exchange couldnt accept the message from Ironport because of "Insufficient system resources" (finally after hours the message had been delivered).

Checking the Exchange server memory showed no problem, but the disk where Exchange software is installed (D: in my environment) had only 2.3 GB left.
I have just migrated all the mailboxes in some days and the fastly growing logs (basically IIS and message tracking) were causing my D: drive to be almost full. Newbie failure ๐Ÿ™

So, steps I have performed to solve this issue:
– To quickly restore normal flow of the email, temporary moved the logs to C: drive that had enough space to generate no problems with that movement
– Assigned a new SAN LUN to each of the Exchange servers so I can configure a new drive to store the logs. If for any reason Im not aware of the disk getting full, this wouldnt cause any problem to the mail flow service
– Once configured the new drive I could configure the Exchange logs paths pointing to the new drive and move the logs from C: drive to the new location

Additionally, I have to… monitor the disk space!

So, It is interesting to change Exchange logs paths to another location different from where system and Exchange are installed. This way you'll sleep better ๐Ÿ˜‰

 

 

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