So ... Let's see the available options ...

1. Antispam Filter

These are the basic settings that will help you to detect spam comments. In plain English: these features will help you to filter and review the comments before they show on your blog posts or website. Here they are:

• trust approved commenters; basically, the plugin will automatically approve comments from regular and trustworthy commenters
• trust commenters with a Gravatar; it is the same technique as approved commenters, but with this setting the plugin will remember the Gravatar of the trustworthy comment makers
• consider the comment time; if enabled, the filter will consider the comment time too; this setting is not recommended by the plugin author for blogs or websites using page caching!
• BBCode is spam; it's a recommended setting that will allow you to handle/check comments with BBCode (Bulletin Board Code) links and mark them as spam; this link format is widely used by spammers to highlight words and links
• validate the IP address of commenters; you'll be able to validate the IP addresses used by the commenters to check their network information like hostname (this helps in finding the online background of the commenter to decide if the comment is useful or spam)
• use regular expressions; if enabled, it helps in finding the unwanted comments with a set of predefined (regex) patterns that are very useful to detect spam
• look in the local spam database; if enabled, it will look for the spam content in your site’s database and then treat it as you define further settings for the spam
• use a public antispam database; this setting is linked with the Stop Forum Spam database in order to detect IP addresses of active spammers and quickly check the history of the commenters; Stop Forum Spam is a free service that records reports of spam on forums, blogs and wikis, etc and it works with the complete IP addresses of the senders (so the commenters from EU countries will be avoided)
• block comments from specific countries; you can define your own list of specific countries to filter spam comments; the blacklist/whitelist ISO codes are given with this setting, so you can easily declare each country code

• allow comments only in certain language; you can specify a language for the commenters, so comments in all other languages will be blocked or deleted as you define later

OK. Now let's see the second section ...

2. Advanced Tools

This is where you can further set the options to manage, block and delete the unwanted comments. Here they are:

• mark as spam, do not delete; if enabled, this setting, it will keep the spam comments and won’t delete them
• spam-notification by email; if is enabled, you'll receive an email notification for every spam comment (not recommended)
• do not save the spam reason; if enabled, the plugin will not store the suspicious values (formatted links, comment time, etc) of a comment in a separate column
• delete existing spam after X days; it's a very useful and important option because will allow you to define the number of days after which the spam comments are automatically deleted
• limit approval to comments/pings; this option will define whether you want to approve comments or trackbacks; if you limit approval to comments, then trackbacks will be automatically deleted, and similarly, if you limit approval to trackbacks, then the spam comments will be automatically deleted from your site
• delete comments by spam reasons; it will allow you to delete comments with predefined spam reasons! and you can select multiple reasons from the options to delete the unwanted comments automatically

Finally, let's see the last section ...

3. More Options

Basically, these are reporting options that will allow you to display your daily spam updates on Wordpress admin dashboard area. These reports will help you monitor the spam comments easily, and you can also analyze between the numbers of useful and unwanted comments.

Here they are:

• generate statistics as a dashboard widget; if enabled, this setting will create a spam report in an interactive widget for your WordPress admin dashboard area
• spam counter on the dashboard; if enabled, it will display the number of total comments marked as spam in a prominent style, and if you are deleting the spam comments, then it will also show the number of deleted comments in an additional column
• do not check trackbacks/pingbacks; by default, the plugin put a check on all the comments, trackbacks and pings; you can avoid checking the trackbacks with this setting (if enabled, the trackbacks/pingbacks from any site will be automatically approved)
• comment form used outside of posts; this very useful feature will monitor comments on your archive pages too

And that's it!

Once you are happy with your choices, click the "Save Changes" button to apply these settings on your website.

And that's it my friends!

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Thanks for your time!