The cause of circular reference occurs when a recipient address references to a nickname in Eudora, which in terms references to a corresponding identical email address in the nickname.
For example, the above suggested that the you enter userid@pacific.net.sg as the recipient address for one of your receipient. However in the nickname there is an entry known as userid@pacific.net.sg and its referencing email address is also known as userid@pacific.net.sg.
