Methods of reducing quota usage
Purdue E-Mail Services
Performance and your ECN Mailbox
If you have an account on the Purdue Exchange server or
this document does not apply.
This document only applies to the ECN maintained Mechanical Engineering mail servers
(Friction, Project and Torsion).
Where is my messages? I looked in /var/mail
and there is nothing there!
In an effort to optimize speed and capacity, the ECN mail server
friction, torsion and project use dmail and MBX formatted mail files. By using MBX formatted files,
we are able to support users with MUCH larger mail files and folders. With dmail,
the users 'Inbox' is stored in the home directory of the user in a file named
INBOX rather than the normal system location /var/mail. There is a small
placehold file left in /var/mail to instruct the server to check the users home
directory for mail.
Is there a quota on my ECN E-mail on ME Mail
As of Spring of 2013, Mechanical Engineering does not enforce
hard quotas for e-mail. The department monitors overall usage of the machine to
ensure adequate capacity for all users. If a problem arises with the usage by
any single user, the department will work with the user to rectify the
situation. The goal of the machine is to meet the needs of all of its users -
adding capacity when required to do so.
In general, for best performance we ask users to keep the total
size of the 'INBOX', 'Trash', 'Deleted Messages', 'Sent Messages' and/or 'Sent'
files under 1GB in total size and total message count under 2000. These specific
files are accessed very frequently and when very large, will place a large I/O
load on the mail servers. Other IMAP folders can be larger.
My Mail is Very slow - what can I do?
The speed of your mail is based on a few factors. The first is
overall network speed. If you are checking your mail from off campus or even out
of the country, the overall network is slower than it is on campus and this will
make your mail 'slow down'.
That said, the single biggest cause of mail slow downs is the
shear size and number of messages in a mail folder. It is simple fact that a 1mb
mail file is easier to parse and send across the network faster than a 500mb
mail file. We strongly recommend 'filing' e-mail into meaningful subfolders to
reduce the size of any single mail folder.
The second biggest cause of mail slow downs is deleted messages
that have not been 'purged' or 'expunged'. With IMAP based mail clients, when
you delete a message, you are actually just copying the message to the 'Trash'
folder and marking it as deleted. You are not actually removing the message from
the file. There is a command in most mail clients to 'compact' or 'purge'
deleted messages. When you execute these commands, the mail file will shrink as
the messages marked deleted are actually removed.