EOM stands for "end of message."
People who exchange a great deal of e-mail sometimes write a very short message in the subject line of an e-mail note and conclude it with: (EOM). This is a little faster to send and saves the receiver from having to take the time to open the note, since the entire message is visible in the subject line.
The "(EOM)" is a signal that the message is wholly contained in the subject line.
Here are great reasons for you to adopt EOM while crafting your email messages.
EOM saves your recipient's time as well as yours
EOM forces you to keep email messages focused on a single topic.
EOM guarantees 100% readership