JUNK E-MAIL FOLDER
For those who use Web mail, the suspected spam can be re-directed to a designated “junk” e-mail folder.  Typically this folder will automatically delete old messages as space is needed.  This provides an opportunity to the recipient to periodically look through them to ensure that there aren’t any legitimate e-mails.

However, this usually requires the recipient to log into their Web mail.  Those using a mail client, such as Outlook, Outlook Express, or Eudora, may not be able to view the contents of their “junk” e-mail folder.  In this instance, the effect is the same as permanently deleting the suspected spam. 

If this option is used it is important to make sure that you have access to the “junk” e-mail folder.  Otherwise, you might as well just have them automatically deleted and you run the risk of losing important, legitimate e-mail. 

THE APPROVAL E-MAIL ACCOUNT
Some anti-spam filters will allow the recipient to specify an approval account that suspected spam will be re-directed to.  The authorized person who checks the approval account can then look through the e-mail in this account and any legitimate e-mails can be approved and sent on the original recipient. 

This option works best for e-mail administrators who are responsible for many e-mail accounts on a domain.  However, the e-mail must still be reviewed to sort the legitimate e-mail from the spam.  It still requires a significant amount of time to administer, but it does allow for legitimate e-mail to get through the filtering process.

CONFIRMATION E-MAIL
This action works very much like the White List Only method except rather than temporarily block ALL incoming e-mail, only those first flagged as spam are affected.  The sender is then sent an e-mail asking them to confirm that they sent the message and if they provide the confirmation, usually by clicking a link in the e-mail, it is sent to the intended recipient.  The logic is that those who send out mass amounts of spam either do not monitor the sending e-mail address for replies, or they will not take the time to confirm the e-mail.

This can be an effective way of dealing with spam, however, it still places the burden of controlling the spam on the sender.  If they don’t take the time, the e-mail will never get to the recipient.

PERMANENTLY DELETING SPAM
The most drastic action is to simply delete any suspected spam.  This can be dangerous; how dangerous depends on the method of identifying spam that is being used.  If your anti-spam filter is 100% accurate at identifying spam, then this works very well.  However, in practice it is unlikely that there will be no false-positives in any chosen anti-spam method.

Considering the Bayesian filter, many of the keyword that appear in the filter will also be present in title industry related e-mail as explained above.  Consider an e-mail from a new client requesting title search for “Homeowner: John Smith” identifying the transaction as a “Cash-out Refinance”.  This e-mail would contain two keywords very common in Bayesian filtering; “homeowner” and “refinance”.