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 causes ListManager to sometimes think the subject is 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.
NOTE You can choose yes for both Allow blank subject and Allow blank body. However, if one of these (subject or body) is blank, the other cannot be. If you attempt to send a message where both are blank, you will receive an error message.