Figure 8-29
Reset Anti-Relay Data File
This feature ties directly to AIT’s relay ruleset. AIT’s system of POP and SMTP services follows procedures so that a user’s POP or SMTP server cannot be exploited and used to send Unsolicited Commercial Email (UCE, otherwise known as spam). AIT’s SMTP servers are setup to give a Relaying Denied error, which is a global error that can be given by any SMTP server, or a dial up access provider. If a user receives a Relaying Denied message when attempting to send email, ensure that the user has checked their email (typically called popping for mail) before attempting to send email. If a user does this, the server will record the IP address/location where the user is dialed up FROM. This lets the server know that you are a valid user and you have authenticated with a valid username and password from the POP server.
This IP address is written into /etc/mail/relay-domains file on the Virtual Server. When you attempt to send email, the SMTP server will view the contents of this file, and find the IP address that the user is connected to and verify that this IP is the same one that is being used to send email. If so, the server will send email. If not, the sender will receive a relaying denied error.
Each night at midnight eastern time, the /etc/mail/relay-domains file is set back to nothing, or zero’ed out. The feature of resetting this file manually during the day ensures that the contents of this file are cleared.
Figure 8-30 below shows the results of clicking the link to reset the file.
Figure 8-30
Remove Auto Responders
Removing an auto responder or email responder is as simple as inputting the username portion of the email address in the form, and clicking the remove button.
Spam Prevention Tool
This tool allows users to block email from unwanted addresses. The address input box, shown in Figure 8-31, can contain a variety of entries specifying whose email the user wishes to refuse, including the following:
User Address: user@host.com
Host or Domain Name: host01.spam.com OR spam.com
IP Address: 123.123.123.123
Figure 8-31
Upon addition of an email address, IP address or host name, the results will display, as seen in Figure 8-32 below.
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