The drop-down list displays the following session time out options:

• Never
• 15 minutes
• 30 minutes
• 1 hour
• 1.5 hours
• 2 hours
• 3 hours

The default PostalCare User Session Time Out is Never. Select the session time out you want from the drop-down list.

5.3.3 Bypass Mode

This allows the organization to ensure that all the servers are configured correctly and running smoothly before implementing the PostalCare filtering processes.

In Bypass Mode, PostalCare is actually running, but not actively filtering emails. However, statistics are kept and displayed as if the emails are being filtered. This allows you to see how effective PostalCare would have been had it been running normally.

When PostalCare is first installed, Bypass Mode is enabled (turned on) by default. The License Key for this organization must be entered into the General window ("General" in the Main Menu) in order to disable Bypass Mode.

To disable Bypass Mode, select the radio button beside No. To re-enable Bypass Mode, select the radio button beside Yes.

5.3.4 Email Delay Delivery Interval

The default Email Delivery Delay Interval is set to 10 seconds.

5.3.5 DNSBL

A DNSBL is a DNS (domain name service)-based spam blocking list used to reject or filter criteria. See www.dnsbl.com for more information on DNSBL.

Click on the select drop-down list arrow to view and select the default DNSBL choices that are configured into PostalCare.

You may also choose to use a DNSBL list that is not in the default list by first selecting Other in the DNSBL drop-down list, then typing the DNSBL address into the Other DNSBL field.

Then type in the address of the DNSBL list you want to use into the Other DNSBL field. For example:

DNSBL:           Other
Other DNSBL:

A Spam Zombie is a computer (usually with a high-speed Internet connection) that is being exploited by spammers to send out huge volumes of spam email. Incorrectly installed software and/or improperly secured computers allow viruses to infect the machine which then allow the spammers in to send their spam.

PostalCare can detect if a computer is sending large volumes of emails out, and if the volume exceeds the specified Zombie Spammer Threshold in a 1-hour time frame, an Alert Message is displayed in the General window for System Administrators.

The Zombie Spammer Alert details include:

• Date and time of the alert
• Time period that the threshold was exceeded
• Sender IP address
• Zombie Threshold exceeded
• Message details

To enable the Zombie Spammer Threshold, select the Enable radio button. Then type in a number for the threshold in the Zombie Spammer Threshold? field. This number should be the maximum number of emails allowed to be sent by any given sender during a 1-hour time period before assuming the computer has been exploited by a spammer. The default threshold is set to 500.

To disable the Zombie Spammer Threshold, select the Disable radio button.

5.3.8 postalcare_alerts.log Location

The default logfile location is:

postalcare_alerts.log Location: c:\postalcare\data\

To change the location, delete the default path and type in the new path in the same format as the default.

5.3.9 Email Relays Allowed

The options for allowing email relays are:

• Inside IP Address Only: Email relays are only allowed by those whose IP address is an inside IP address. No outside IP addresses are allowed to relay at all.
  
  
• Authenticated with any Username and Password: Email relays are allowed by those with an outside IP address who have any username and password configured into their SMTP Server settings. For example:
  
  Anyone with an outside IP address who has any username and password configured into their SMTP Server authentication settings are allowed to send email through this organization's SMTP server.
  
  
• Authenticated with specified Username and Password: Email relays are allowed by those with an outside IP address who have a specific username and password configured into their SMTP Server settings. If the username and password are correct their emails will be allowed to relay through the organization's SMTP server. For example:
  
  This organization's SMTP server is set to only allow emails from senders who have the following username and password configured into their SMTP Server authentication setting:
  

  Username: company_name Password: zyx911

  
  
  

• Username matches password and username is a Known Email Recipient: Email relays are allowed by those with an outside IP address, who are configured in PostalCare as an email recipient, and their username is the same as their password and PostalCare email recipient username. For example:
  
  [email protected] is a PostalCare email recipient who has an outside IP address.
  Jane has her email SMTP Server settings configured to authenticate with the following username and password:
  

  Username: [email protected] Password: [email protected]

  
  Jane will be allowed to relay her outgoing emails through her organization's SMTP server.

The Clear username and password after authentication checkbox allows clear the authentication username and password after the PostalCare has processed the email. This setting is used mainly in the case of when the real SMTP server does not support usernames and passwords for authentication. The real SMTP server then rejects the email because it doesn't know how to deal with it.

Place a checkmark in the checkbox to clear the authentication username and password before the email is sent to the real SMTP server. Remove the checkmark if you want the username and password to remain.

5.3.10 Save Spam Emails

The spam retention options available are:

• Forever
• 1 day
• 2 days
• 3 days
• 4 days
• 5 days
• 6 days
• 1 week
• 2 weeks
• 3 weeks
• 1 month
• 2 months
• 3 months
• 6 months
• 1 year

Note: Storage of these emails requires a significant amount of disk space.

The SheerPower database file where the spam and blocked emails are stored is called:

spam_email.ars

This file name cannot be changed.

Type in the device name and location of where you want to store the spam and blocked emails.

For example:

e:\postalcare\spam

The default location is:

c:\postalcare\data\

Once you have completed maintaining the General Settings for PostalCare, click on the Save & Return to Administrative Settings button to save your changes and return to the main menu.

5.4 SMTP Servers

• the PostalCare SMTP Server
• the 'Real' SMTP Server
• up to 3 Alternate SMTP Servers

The PostalCare SMTP Server is the server running PostalCare which receives the incoming emails to be delivered to this organization. It then processes the emails and forwards them on to the real SMTP server.

The Real SMTP Server is the server that receives the allowed emails from the PostalCare server, then delivers the emails to the recipients.

The Alternate SMTP Servers are alternate servers available in the event that the real SMTP server fails. Up to 3 alternate SMTP servers can be specified.