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SMTP Authentication

How to Configure SMTP Authentication? How can I force mail clients to provide a password to send mail?

Why am I getting "550 unknown local host, not a gateway" errors when sending mail?

To combat SPAM, our email servers require authentication to send/receive mail. All remote mail client must enable the SMTP authentication function to send outgoing mail through IMail server.

Outlook and Outlook Express

To configure authenticated SMTP in Outlook Express:

  1. From the Tools menu, select "Accounts..."
  2. Highlight your Mail account (it may be called mail.domain.com).
  3. Click the "Properties" button on the right side.
  4. Choose the "Servers" tab.
  5. Check the box next to "My server requires authentication."
  6. Click the "Apply" button.
  7. Click the "OK" button.

Netscape Messenger

To configure authenticated SMTP in Netscape Messenger:

  1. From the Edit menu, select "Preferences..."
  2. Click the plus (+) icon next to "Mail & Newsgroups."
  3. Choose "Mail Servers."
  4. In the "Outgoing mail server user name" field enter email address: username@domainname.com
  5. Click the OK button.

Eudora

To configure authenticated SMTP in Eudora:

  1. From the Tools menu, Select "Options..."
  2. Click on the the "Sending Mail" icon.
  3. Check the box next to "Allow authentication."
  4. Click the OK button.

Entourage

To configure authenticated SMTP in Entourage:

  1. From the Tools menu, select "Accounts."
  2. Double-click your Mail account (it may be called mail.domain.com).
  3. Click on the "Click here for advanced sending options" button.
  4. Check the box next to "SMTP server requires authentication."
  5. Select the radio button next to "Use same settings as incoming mail server."
  6. Click the OK button

Thunderbird

To set up Thunderbird (or Mozilla Suite) to use authentication with your SMTP server:

  1. Go to "Tools -> Account Settings -> Outgoing Server (SMTP)"
    (If using Mozilla Suite: go to "Edit -> Mail & Newsgroup Account Settings -> Outgoing Server (SMTP)".)
  2. Check the "Use name and password" option.
  3. Add your username..
  4. Click "OK".


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