Multiple Recipient Addressing

Another advantage of email addressing is that it allows the easy specification of multiple recipients. With paper mail, sending a message to ten people means you need ten copies of the message, ten envelopes, and ten stamps. With email, you just list the recipient addresses separated by a comma in the recipient list: <user1@domain1>,<user2@domain2>,<user3@domain3>. A separate copy is mailed to each recipient. Of course, aliases and/or address books can be used to specify each recipient here as well, making this even simpler.

Since email makes it so easy for one person to send information to a set of others, so-called one-to-many messaging, it was also one of the first ways in which electronic group communication was ...

Get TCP/IP Guide now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.