You have mail
You have new mail
No mail for username
Otherwise, you will see a list similar to the following:
$ mailx Mail version 4.0 Thu Jan 16 12:59:09 PST 1992 Type ? for help. "/var/mail/rose": 4 messages 1 new 2 unread 1 rose@texas Fri Feb 14 12:01 21/453 to someone who U 2 hank@fretful Fri Feb 14 18:31 19/353 so lonely I U 3 farmer@freeway Sat Feb 15 10:22 24/557 looks like my >N 4 hoover@woofer Sun Feb 16 23:59 14/280 big old furry &
On the next line, mailx specifies the location of your mailbox, the number of letters received, and their status.
Next, mailx shows a numbered list of the letters in your mailbox. From left to right, the columns in each line specify:
Status: indicates whether a letter is new (N), unread (U), or read (no symbol). A ">" at the beginning of a line indicates the current letter. Deleted letters are marked with an asterisk (*).
Number: indicates order in which letter was received.
Sender: indicates name of user (and usually machine) letter came from.
Time: indicates date and time letter was sent.
Size: indicates number of lines/number of characters in letter.
Subject: indicates sender-designated subject of letter.
When you have a large number of letters in your mailbox, the displayed list may not show all of your mail. If this is the case, type: