The BoxTrapper feature filters spam from your inbox through challenge-response verification. When an account with BoxTrapper enabled receives an email, BoxTrapper automatically sends a verification email in response. The sender must complete the verification process before the email can pass to your inbox. If the sender does not verify the email, the verification fails and BoxTrapper never clears the message for delivery. After a period of time, the system automatically deletes the spam.
Enable BoxTrapper
To enable BoxTrapper, perform the following steps:
.1Click Manage for the account that you wish to modify.
.2Click Enable.
Note
When you enable BoxTrapper, it whitelists any email address to which you send email.
BoxTrapper Configuration
To edit BoxTrapper settings, click Manage next to the account that you wish to modify. The BoxTrapper Configuration interface will appear.
Configure BoxTrapper
To configure BoxTrapper settings, perform the following steps:
.1Click Configure Settings.
.2Enter a comma-separated list of email addresses that forward mail to the account in the Email addresses for this account text box.
.3Enter your name in the Your Name text box.
.4Enter the number of days for which you wish to keep logs and messages in the The number of days that you wish to keep logs and messages in the queue. text box.
.5Enter the desired minimum spam score in the Minimum SpamAssassin Spam Score required to bypass BoxTrapper text box.
NoteWhen BoxTrapper receives an email with a spam score that is lower than the Minimum SpamAssassin Spam Score required to bypass BoxTrapper value, it automatically delivers the message. You may set a low value for this option to cause BoxTrapper to respond to more messages, or a high value to cause BoxTrapper to automatically deliver more messages. For example, a minimum spam score of 5 will cause BoxTrapper to respond to more messages than a minimum spam score of 10. The default value for this option is -2.5. For more information on SpamAssassin spam scores, read the  SpamAssassin spam score section of this document.
.6To enable or disable automatic whitelisting, select the appropriate checkbox. When you enable whitelisting, BoxTrapper whitelists any email address to which you send email.
.7Select the Automatically whitelist the To and From lines from whitelisted senders (whitelist by association) checkbox to automatically whitelist addresses in the To and CC lines of incoming whitelisted emails.
.8Click Save.
SpamAssassin spam score
SpamAssassin works by analyzing an email and giving it a spam score. Emails with higher scores are more likely to be spam. SpamAssassin also supports negative scores. Emails with negative scores are typically not spam. SpamAssassin uses a variety of techniques and tests to determine spam including,  Bayesian filtering , blocklists, DNS (Domain Name System), and online databases. For more information on SpamAssassin tests, read the  SpamAssassin documentation. There is no limit to how low or high an email’s score value can be.
Edit confirmation messages
Box Trapper automatically responds to email with messages that the system builds from the following templates:
Template
Description
verify
BoxTrapper responds with this message when an address that does not exist on the whitelist or blacklist sends an email. This message requests a response to confirm that the sender is legitimate.
verifyreleased
BoxTrapper responds with this message when a person responds to the verify message with an email or a click on the verification link.
returnverify
BoxTrapper responds with this message when the verification process fails.
blacklist
BoxTrapper responds with this message when a blacklisted address sends an email.
Click Edit to customize the verification and blacklist message templates.
These templates use the following variables:
Variable
Description
%email%
The sender’s email address.
%fromname%
The recipient’s name.
%subject%
The subject of the sender’s email.
%acct%
The recipient’s username.
%msgid%
The message ID of the sender’s email.
%headers%
The heading information of the sender’s email.
%if can_verify_web%
%endif%
These tags enclose a section that allows BoxTrapper to verify senders through a web link.
Warning
Do not alter verify#%msgid% in the subject line of the verify message template. BoxTrapper requires that specific code to function properly.
To restore the default message templates, click Reset to Default.
Edit whitelists, blacklists, and ignore lists
To edit lists, perform the following steps:
.1Click Edit White/Black/Ignore lists.
.2Select the list that you want to modify.
.3Enter any messages, subjects, or email addresses for which you wish to filter.
.4Click Save.
BoxTrapper lists
The system compares every new message that you receive against the following three lists:
List Type
Description
Whitelist
The system delivers messages directly to your inbox.
Ignore list
The system deletes messages without a notification.
Blacklist
The system deletes messages, and the sender receives a reply that indicates that the system blocked the message.
Forward List
Click Forward List to update the account’s forward list. Enter email addresses that you wish to add to the forward list, and click Save. The system will automatically forward whitelisted emails to these addresses.
Review Log
The system organizes this log by day, and displays any activity for an email address that uses BoxTrapper. Use this log, for example, to isolate problems with email delivery.
Review Queue
Click Review Queue to view any unverified BoxTrapper mail.
To deliver or delete emails, perform the following steps:
.1Select the checkbox for the desired day.
.2Select Delete or Whitelist and Deliver.
.3Click Submit.
To see the contents of a message, perform the following steps:
.1Click the email’s sender, subject, or date to see the entire message, headers, and more delivery options. For example, you can ignore or blacklist a sender.