The Email world is highly abused and Wildcat! SMTP has advanced Email Filtering features with components such as wcSAP and SMTPFILTER, to help filter the abusive unknown mail coming to your system.
The keyword here is "unknown" since it is generally the case you don't have a spam problem with your known mail senders. Since your friends, customers and business associates may not already by known by your Wildcat! SMTP system, scripts such as GreyListing can reject or delay the reception of the mail they are sending to you.
Wildcat! has an unique called Auto WhiteListing where it will white list an email address you have communications with automatically the first time you send mail to them. The idea is if you send mail to a person, then you know who they are and you would accept mail from them when they reply to you.
A WhiteList is an acceptance list, so if the person's address is in the white list, then the seneder is not subject to the restrictive SMTPFILTER scripts such as GreyListing. See Wildcat! GreyListing.
To enable Auto WhiteListing, there are three items to work with here:
The SMTPFILTER script called smtpfilter-autowhite.wcx should be among the first scripts run, thus it should be near the top of entries in the [HOOKS] section of the data\smtpfilterhookloader.ini file. For example:
[Hooks] smtpfilter-dkimverify smtpfilter-autowhite smtpfilter-checkwords smtpfilter-greylist
The above SMTPFILTER scripts are stock features available with Wildcat! and the order above is the recommended order of running the scripts.
Finally, Auto Whitelisting is only enabled for your user's email addresses or domains listed in the data\autowhite-checklist.txt list file. This allows you control of which users or domains you host, can auto whitelist other addresses. For example, the following users on our system has access to auto whitelist email addresses they send mail to:
winserver.support@winserver.com support@santronics.com sales@santronics.com hsantos@santronics.com
Globals can be used by using an asterisk, i.e, *@mydomain.com
When a target address is auto whitelisted, it will added to the file data\autowhite-whitelist.txt. This file will be checked by smtpfilter-greylist.wcx to determine if the sender is not subject to greylisting.