Setting Your E-mail Client to Use SMTP Authentication
If you are using a "fat" e-mail client (that is, one that
requires software other than a browser installed on your computer),
you need to make sure it is set to use "SMTP Authentication"
for sending messages. This security measures helps ensure that your
computer is not being used to send messages without your knowledge or
permission.
The Cornell e-mail service now supports authenticated SMTP. On February
8, 2006 the service was made mandatory. If you're suddenly having problems
sending e-mail, this is probably why. Read on to find out how this affects
you and how to tweak your settings.
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If you are using browser-based e-mail, such as WebMail
or the uPortal.Cornell
eMail Channel, you do not need to change any settings.
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This setting only applies to computers communicating
on the Cornell campus network (or when using Cornell as your ISP
through EZ-Remote
or Express
Lane) and using Cornell's mail servers. If your e-mail settings
show you using "postofficeX.mail.cornell.edu"
(where X is some number)
for your mail server, you need to make these changes. If
you are using another ISP (such as RoadRunner, AOL, or Lightlink)
and your mail server does not have "cornell.edu"
in its name, you should not change your e-mail client settings.
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IMPORTANT NOTE: If
- you are using Windows
AND
- you are using a fat client (see the opening paragraph
above)
AND
- you are using Symantec AntiVirus (SAV) Corporate Edition
as distributed by Bear Access
you will need to configure SAV's Internet E-mail Auto-Protect
by UNchecking Enable Internet E-mail Auto-Protect.
This setting must be turned off because it does not support
TLS/SSL out-going SMTP connections. Here are instructions
for configuring SAV.
(This will NOT adversely affect the safety of your messages,
since Symantec still scans any attachments as they are
prepared to be sent by Eudora, and our mail system scans
outgoing mail for viruses.)
It is also important that you use SAV version 10, which
is the version currently distributed to the Cornell community.
Visit the CIT Contact Center (HelpDesk) in the CCC building
or call 255-8990 for assistance.
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Additional Information for Network Administrators
and the Technically Inclined
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On this page you'll find links to instructions for setting a variety
of e-mail clients to use SMTP Authentication. Thunderbird and Eudora are the clients
distributed by and recommended by CIT. The other clients listed here
are NOT supported by CIT, nor do we recommend their use.
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Instructions for Various E-mail Clients
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You may need to clear your Kerberos ticket
or restart your computer after changing the settings in your client!
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