A custom domain address can also be used with a custom mail server configuration that includes spamassassin. You can even setup IMAP folders for you to drag and

A custom domain address can also be used with a custom mail server configuration that includes spamassassin. You can even setup IMAP folders for you to drag and drop mail into to be learned automatically as spam, ham, or forgotten. You can also setup fairly sophisticated rules with procmail or sieve. A good mail provider will also have this implemented for you. Aside from mining your data for marketing purposes, Google is evil because they continue to store your e-mails even after you delete them. Custom mail solutions are markedly superior if you know what you're doing, like anything else in life that you assume your own direct control over rather than leaving it to someone else.