Utilities: List Settings: Discussion Group Features: Message Rejection Rules: Blanks
Allow Blank Subject
Allow messages to be posted which have a blank subject.
By default, ListManager will not allow messages which have a blank subject to be posted to a mailing list.
Related to this, some email programs place a carriage return in the Subject, which is highly non-standard and caused ListManager to sometimes think the subject was blank. ListManager removes the carriage return in the Subject line to make the message conform better with standards.
Allow Blank Body
Allow messages to be posted which have a blank body.
By default, ListManager will not allow messages with a blank body to be posted to the mailing list. However, allowing blank bodies can be useful if you use your list to post flash messages, where the only text is in the subject.
More
1. Utilities: List Settings: Discussion Group Features
1. Utilities: List Settings: Discussion Group Features: Message Look
2. Utilities: List Settings: Discussion Group Features: Security
3. Utilities: List Settings: Discussion Group Features: Message Rejection Rules
1. Utilities: List Settings: Discussion Group Features: Message Rejection Rules: Blanks
2. Utilities: List Settings: Discussion Group Features: Message Rejection Rules: Same Message Rules
3. Utilities: List Settings: Discussion Group Features: Message Rejection Rules: Etiquette