How to update localnames?

[Swen Thuemmler <swen@uni-paderborn.de>]

Hi,

yesterday I changed the db/localnames file (added some entries). This lead
to some nasty errors ("trying to talk with myself" and such). I
immediately stopped and restarted zmailer, but I wonder what is the
correct method to change localnames (and fqdnaliases and aliases). Can I
edit a copy and then move it in place or do I have to stop zmailer before
changing the file? Normally, I don't want to stop zmailer just for
changing one of these files. Now, localnames is an ordered file, so this
may be the source of the error, but now I wonder about aliases, which I
do edit a lot more often. Is newaliases safe? What are the correct
procedures?

Thanks, Swen