My unqualified host name (localhost) unknown; sleeping for retry

[Lowell Gilbert]

Gert Cuykens <gert.cuykens at gmail.com> writes:

> how do you fix this ?
> 
> Feb  2 12:09:22 I sm-mta[699]: My unqualified host name (localhost)
> unknown; sle eping for retry

Make sure the host's names (including localhost) are defined in
/etc/hosts, and that /etc/hosts is being used in name resolution 
(on 5.3 that would be configuration via nsswitch.conf(5)).