Spam Hound allows you to block email with objectionable content.

Spam Hound comes pre-loaded with four different lists of words and phrases that you can choose to block.

• Pornographic Phrases - This list contains words and phrases that are both sexual and crude.
• Sexual Phrases - This list contains words and phrases that are sexual but not necessarily crude.
• Profanity - This list contains swear words and phrases.
• Miscellaneous - This list contains words and phrases that are commonly found in spam.

All lists are completely optional and you can add or subtract from them to suit your preferences.
Whitelisted senders are of course exempt from being blocked due to using words or phrases in these lists.