1 Topic by tahseen

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Topic: maildrop/44CAC20FDC: error writing 7CAF1921348: queue file write error

==== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.9.0
- Linux/BSD distribution name and version: Ubuntu 15.0
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx):Apache
- Manage mail accounts with iRedAdmin-Pro?
- Related log if you're reporting an issue:
====

I suddenly started getting error like this "maildrop/44CAC20FDC: error writing 7CAF1921348: queue file write error"

I checked postfix and it was running. I tried a lot but nothing worked. And finally I rebooted the machine and it started working.

Is there some problem related to folder space of postfix ? Although I didn't see much issue when I used df command

----

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2 Reply by ZhangHuangbin

  • ZhangHuangbin
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Re: maildrop/44CAC20FDC: error writing 7CAF1921348: queue file write error

Possible solution: http://www.faqforge.com/linux/controlpa … ite-error/

3 Reply by ZhangHuangbin

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Re: maildrop/44CAC20FDC: error writing 7CAF1921348: queue file write error

Also, please make sure your disk has enough spare space.

4 Reply by tahseen

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Re: maildrop/44CAC20FDC: error writing 7CAF1921348: queue file write error

ZhangHuangbin wrote:

Possible solution: http://www.faqforge.com/linux/controlpa … ite-error/

Yes I did this and then restarted postfix. And everything was fine after that

But message_size_limit default value was reasonably high. What is this parameter related to? If I increase it to a very high value then what? And how do I know what value is right for me?

5 Reply by ZhangHuangbin

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Re: maildrop/44CAC20FDC: error writing 7CAF1921348: queue file write error

`message_size_limit` limits size of a single message. Reference:
http://www.postfix.org/postconf.5.html# … size_limit

6 Reply by tahseen

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Re: maildrop/44CAC20FDC: error writing 7CAF1921348: queue file write error

ZhangHuangbin wrote:

`message_size_limit` limits size of a single message. Reference:
http://www.postfix.org/postconf.5.html# … size_limit


But my test message has hardly any size. Last night I had set it up and then sent some test email. After that in the morning I see the log with this error

I searched and increased the message_size_limit but some how I was not very happy with it as I was wondering how come a standstill mail server start giving this error

7 Reply by ZhangHuangbin

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Re: maildrop/44CAC20FDC: error writing 7CAF1921348: queue file write error

OK, please show us some additional info of your mail server:

*) Any other error message related to this issue in Postfix log file?
*) Does it use local hard disk to store mail messages? or use network storage like NAS/SAN/NFS?
*) Are you running iRedMail server in a virtual machine like Xen/KVM/VMware/OpenVZ? or it's running on physical server? According to one old mailing list message posted by Wietse Venema (author of Postfix):

Wietse Venema wrote:

Hypervisors are known to have problems delivering timer events.
Without proper timer support, Postfix processes cannot detect
timeout conditions and will hang indefinitely.

*) Also, it might be  caused by short timeout setting in Postfix if client is connecting through slow network.

8 Reply by tahseen

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Re: maildrop/44CAC20FDC: error writing 7CAF1921348: queue file write error

1) Any other error message related to this issue in Postfix log file?
No this is the only message

2) Does it use local hard disk to store mail messages? or use network storage like NAS/SAN/NFS?
Used space less than 10%

3) Are you running iRedMail server in a virtual machine like Xen/KVM/VMware/OpenVZ? or it's running on physical server? Yes am running it on VPS but this never happened before or maybe before it was Ubuntu 14 and this is Ubuntu 15

4) Also, it might be  caused by short timeout setting in Postfix if client is connecting through slow network
Am on 100Mbps link (up/down)