How to Change Comment Settings on Your Blogger Blog
Comments are both strengths and weaknesses of the blog medium. Both readers and bloggers find the capability to leave a comment, which lets you interact or converse with a blogger, very attractive.
Commenting has a downside: Spammers have discovered the comment technology, as well. Just as with e-mail, you can expect some commenters to tell you about fabulous mortgage opportunities, Mexican pharmaceuticals, and other less-than-savory possibilities — information neither you nor your readers want.
The Posts and Comments settings help you reduce spam on your blog. One of the best ways to reduce spam is to specify who can comment on your blog. From the Posts and Comments screen, select an option from the Who Can Comment options:
Anyone: This option allows the widest possible audience, with no limitations on who can comment. It provides no spam prevention, but it also imposes no barriers to leaving a comment to genuine commenters.
Registered Users: Sets your blog to accept comments only from registered members of Blogger so that you can cut down on some spam. Don't forget that not everyone has a Blogger account — or wants one — so you might lose some real comments.
Users with Google Accounts: Because Google validates the accounts it creates, letting users who have Google accounts leave comments can help ensure that you get comments from humans rather than spammers.
Only Members of the Blog: Prevents anyone who isn't a member of your blog from leaving a comment. No one you haven't personally authorized as a member can leave a comment. This option creates a lot of work for you because you have to maintain the list of authorized members, but you don't get any spam.
You can add members to your blog from the Basic Settings page.
Also on the Posts and Comments page, you can specify your comment moderation options. Change the Enable Comment Moderation setting to Always. Turning on comment moderation prevents anyone from posting a comment that you haven't approved.
When someone leaves a comment, you get an e-mail that lets you know about the comment. From the Dashboard, you can authorize or reject the publication of the comment. You can also moderate comments via e-mail.
Moderating comments is a lot of work for you, but it improves the quality and readability of comments on your blog for your readers, and it discourages spammers in the future.