U

/usr/bin/mail commandContents of the /usr/bin Directory

/usr/bin/mailcompat filterContents of the /usr/bin Directory

/usr/bin/mailq commandContents of the /usr/bin Directory

/usr/bin/mailstats commandContents of the /usr/bin Directory

/usr/bin/mailx commandContents of the /usr/bin Directory

/usr/bin/mconnect command

Contents of the /usr/bin Directory

How to Verify Connections to Other Systems

/usr/bin/praliases commandContents of the /usr/bin Directory

/usr/bin/rmail commandContents of the /usr/bin Directory

/usr/bin/vacation command

sendmail Features

Contents of the /usr/bin Directory

/usr/bin directory

contents ofContents of the /usr/bin Directory

/usr/lib directory

contents ofContents of the /usr/lib Directory

/usr/sbin/editmap commandOther Files Used for Mail Services

/usr/sbin/etrn scriptOther Files Used for Mail Services

/usr/sbin/in.comsat daemonOther Files Used for Mail Services

/usr/sbin/makemap commandOther Files Used for Mail Services

/usr/sbin/newaliases linkOther Files Used for Mail Services

/usr/sbin/syslogd commandOther Files Used for Mail Services

–U option

sendmail commandAdditional or Deprecated Command-Line Options From Version 8.12 of sendmail

undelivered messages

troubleshootingHow to Check Mail Aliases

underscore (_) in mailbox namesConventions for the Format of Mailbox Names

user names, mailbox names andConventions for the Format of Mailbox Names

UUCP (UNIX-to-UNIX Copy command)

mailersUNIX-to-UNIX Copy Program (UUCP) Mailers

testing the connectionHow to Test the Mail Configuration