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E-mail attachments are a quick way of transferring files,
pictures, and jokes to business partners, and friends. The e-mail message
itself does not take up much space in the customer's account; however, the
attachment included with the e-mail can take up enormous amounts of
space. When a message is forwarded from person to person
and each person adds a little bit more text (and,
possibly, more attachments) one very large file has been created.
If you are close to maximizing your account space, it is important to understand
the conversion that is used to dictate "size." The terms the
computer uses are: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte, Petabyte, and Exabyte. The average
text-only e-mail can range from 2KB (Kilobyte)
to 40KB or more. Picture or file attachments can take a file up to
6000KB or more per e-mail message, and the Mail@umd e-mail system has a
10MB limit on the file size.
- 1,024 Byte = 1 Kilobyte (KB)
- 1,048,576 Kilobyte (KB) = 1 Megabyte (MB)
- 1,073,741,824 Bytes = 1 Gigabyte (GB)
- 1,099,511,627,776 Gigabyte (GB) = 1 Terabyte (TB)
This means that an e-mail attachment that is listed as 6000KB is actually
taking up 5.85MB (Megabytes) of the e-mail account space.
Attachments saved within e-mail may store
the files for you but will quickly use the default disk space. It is
always best to download any attachments into a folder on your hard drive
and then delete the e-mail.
When the e-mail account is running low on available space, the size of each
message can be shown to help direct the user to the problem spots.
Clients vary on how to do this.
| Instructions for Various E-mail Clients |
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Windows Platform
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Macintosh Platform
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Windows Clients
Mozilla Thunderbird
- Launch Thunderbird
- Click the Column Selector Widget icon (on the
right of the Column Headers at the top of the Thread Pane) and a listing
of Column Headers appears

- Select Size (a check mark to the left of
the column header means that header is currently showing)
- Release the mouse and the Size column should appear
SeaMonkey
- Launch SeaMonkey
- Click the Show⁄Hide Columns icon (on the
right of the Column Headers at the top of the Mail Window) and a listing
of Column Headers appears

- Select Size (a check mark to the left of
the column header means that header is currently showing)
- Release the mouse and the Size column should appear
Outlook 2003
- Launch Outlook 2003
- Select Arrange By from the View
menu
- Click Current View
- Click Customize Current View
- Click the Fields button
- Click Size in Available fields
- Click the Add button
- Click the OK button twice
Outlook 2007
- Launch Outlook 2007
- Select Current View from the View
menu
- Click Customize Current View
- Click the Fields button
- Click Size in Available fields
- Click the Add button
- Click the OK button twice
Outlook Express
- Launch Outlook Express
- Select View then Columns from
the Menu Bar
- Click Size to select
- Click the OK button
Eudora
- Launch Eudora
- Select Tools, then
Options on the Menu Bar
- Select Mailboxes
- Click in the boxes to select or deselect the options you want, in
Show Mailbox Columns
- Click the OK button
Macintosh Platform
OS X Mail
- Launch OS X Mail
- Click View, then Columns, and
finally, Size on the Menu bar

Entourage
- Launch Entourage
- Click View, then Columns, and
finally, size on the Menu bar

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