Gets the message number of the last message ever accessed in this mailbox during actual
or all prior POP3 sessions.
MailBee.NET (in MailBee.NET.dll) Version: 11.2.0 build 590 for .NET 4.5
Public Function Last As Integer
On success, the message number of the last message ever accessed, or 0 if no messages have ever
been accessed in the mailbox; on failure, -1.
Although LAST command was originally intended for locating new messages,
it was deprecated in subsequent revisions of the POP3 protocol due. Use of this
command is not recommended.