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MKALIAS(8) System Manager's Manual MKALIAS(8)

a YP map conversion program

mkalias [
] [
-E | -e [
] input [

mkalias is used to convert a mail.aliases map to a mail.byaddr map. This is an inverse map of user@host (or user!host) back to alias.
The options are as follows:
Assume domain names are OK. Only useful together with -E or -e.
Same as -e, but also check for any MX-record.
Check host to verify that it exists.
Capitalize name. e.g., mats.o.jansson becomes Mats.O.Jansson.
Assume UUCP names are OK. Only useful together with -E or -e.
Verbose mode.
Use this map as input.
Use this map as output. If the output map isn't given don't create database. Can be useful together with -E or -e.

yp(8), ypserv(8)

Mats O Jansson <moj@stacken.kth.se>

mkalias on SunOS 4.1.x seems to have a -s. Since I don't know what it is supposed to do I haven't implemented it. But it is accepted by the program.
July 16, 2013 OpenBSD-current