Most electronic mail systems have some built-in support for group communication ranging from simple distribution lists to advanced computer conferencing systems. Even in those systems that do not support group communication, there is almost always a command to write a reply to a multirecipient message, such that the reply is sent to all recipients of the previous message. Thus you do not need to input the names of all the recipients again. This means that the previous message is in fact used as a kind of implicit distribution list. Even this simple aid supports and is often used for group communication.
Group communication using electronic mail is very different from ordinary meetings.
All communication must be done in this short period, or it will have to wait for the next scheduled meeting, which might be a week or a month later. If you forget one aspect of an issue, have to look up a fact, or get an idea the next day, then it has to wait until the next meeting. With electronic mail, the process is not concentrated in a fixed meeting period. Participants enter the system when they have time, read what others have written, give their own views, and connect again at a later time. Electronic mail is more efficient for some kinds of group communication for the following reasons You save the cost and effort of travelling and gathering everyone in the same place at the same time.