UUCP truncates system names to seven characters

System Administration Guide
Chapter 7, Connecting to other computers with UUCP

By default, UUCP truncates system names to seven characters to ensure compatibility with all versions of UUCP. Although disabling this feature is not recommended, it can be done.

In the file /usr/lib/uucp/Permissions, add the variable MYNAME=name to each entry in this file, where name is the actual system name that contains more than seven characters. Also, add a new entry in /usr/lib/uucp/Permissions as follows:

   MACHINE=OTHER \
   READ=/usr/spool/uucppublic:/usr/tmp \
   WRITE=/usr/spool/uucpppublic:/usr/tmp \
   COMMANDS=rmail:rnews:uucp \
   SENDFILES=yes REQUEST=yes \
   MYNAME=name

where name is the actual system name.

The MYNAME variable supersedes the truncated name. This procedure should be done on every machine in the UUCP network that has a name more than seven characters long.

NOTE: MYNAME affects only those systems calling into the system with a Permissions file that has been modified as described here. Calling out to a system with a system name longer than seven characters results in that system name being truncated to seven characters. This is only a problem if your system calls systems with names which are identical through the seventh character.