There is a limit of 50 messages per day on the list. Messages after the 50 limit will be held until the next day. Particularly during heavy traffic periods, consider whether your note is better sent to a particular individual rather than the list as a whole. The list is busiest in August, January, November and March. June, July and December are quieter periods.
American holidays tend to be much lighter than other days.
Some people find this traffic level burdensome. Remember that not every message must be read carefully. There are some types of messages that deserve special attention. The InterNet is a complex and rapidly changing system of many different kinds of computers, operating systems and mail programs. I wait for about a week to see if the error messages from a particular node are continue.