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problem with qmail

Hi...
My company's email server is running on Linux RedHat 7.3, and the email server is qmail. All the while it's been working well (2 years now), but suddenly these 2 days we can't send email with attachment. If there's no attachment of the attachment is only 20-30KB, no problem. But if the attachement is about 200KB none of us can send email.

The error message in outlook express when i send the email :
Unknown error. Object", Account 'myaccount', Server:'server.ip.address', Protocol:SMTP, Answer from server: '451 qq write error or disk full (#4.3.0)', Port: 25, Protection (SSL): No, Error from server:451, Error number: 0x800CCC6A.

i did a df -H command and this is one of the entries:
/dev/sda5 1.1G 1.1G 375K 100% /var

is this the one causing the problem?? is the hard disk full??
Please help. I'm very new at Linux so please kindly elaborate more on the commands and give me step by step instruction on how to solve this.
Thanks!!!!

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bluefile
Asked:
bluefile
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1 Solution
 
fridomCommented:
Well the hardisk is full and nothing could be written to it any longer. That is definitly a problem.

Regards
Friedrich
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bluefileAuthor Commented:
how do i solve the problem??
when i did the df -H command, i can see in other partition (eg /dev/sda3 etc) there is still empty space..
is there any file i can clean up at that partition?? i don't know which file is important and which one is not
thanks!
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fridomCommented:
It's not possible to tell what you can remove without knowing which Linux you have installed. What you can do is login as root, finding the most filled directory, copy the content to a free partion and make a symbolic link.

You can move all from that partition to a new larger one too and mount that
as you /var directory tree.

You can  check if /tmp is a symbolic link to /var/tmp and modify the link to point to a free location and and and

Only you can decide what data are needed and which one can be removed.

Regards
Friedrich
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bluefileAuthor Commented:
hmm.. ok thanks
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