There are only 2 possible causes of an e-mail client receiving multiple copies
of a message that was sent only once by a sender:
I.
The most common cause of multiple e-mails is configuring your POP
client (eg. Outlook, Outlook Express) to leave copies of your e-mail on
the mail server.
Every
time your e-mail program checks for new messages it makes a connection
to your mail server and has look at what is there and compares it to
what you already have on your computer. After it does this, it is
supposed to download only the new messages. However, if the mail
headers stored on your computer become malformed or corrupt your mail
program does not know you already have the message and downloads it
again.
Before checking your email via your POP client, log into your e-mail using Netfirms webmail (http://webmail.netfirms.com).
If you only see one copy of the message in Web mail but you see
multiple copies in your e-mail program you can be sure that the problem
is with your mail program.
The quick fix for this is to change the setting that causes your mail program to leave a copy of mail on the server.
In Outlook 2003:
1. Selecting Tools
2. Click E-mail Accounts
3. Choose "View or change existing e-mail accounts"
4. Click Next
5. Highlight the entry for your mail account
6. Select Change
7. Click More Settings
8. Under the Advanced tab there is a check box next to Leave a copy of messages on the server. If you uncheck it
9. Click OK
10. Click Next
11. Click Finish
The
next time you check mail your messages will be removed from the server
and each time you check mail you will pull down the new messages only
once.
II. The other reason for recipients to receive multiple copies of the same
email message is if the recipient mail server does not respond quickly enough to
the sender server. As such the recipient server attempts to resend the e-mail
message at intervals until the message is accepted by the recipient mail server.
At times when a mail server is overloaded or busy it may not accept new
messages immediately.
Glossary
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