For large lists, limit the size of your message or each item in your message to no more than two sentences and provide a web page address for the reader to get more information. This will likely get a better response from readers and improve chances that your messages will be read. Some systems will refuse them because they make your message too big and others may refuse to process attachments for group mailings because they easily spread viruses or consume too many system resources. Many people also refuse to open attachments that are sent to them via a mailing list. Still others choose to use mail readers that don't process attachments.
Mass mailings can impact central system and network resources.
Disk space, CPUs, and networks can become bogged down processing thousands of messages. Check your spelling and grammar and verify that any web addresses you put in your message are correct and actually work. New employees are added to the appropriate moderated list as the information is received from Human Resources and other departments. New employees wishing to subscribe to the unmoderated list and other optional e-mail lists may do so via the web if they have a slate username and password. You should receive a confirmation message back telling you if your request to subscribe to the list has succeeded.