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Sendmail problem

I got my Jails running 3 web server with sendmail enable. This is to enable my web server to send an email using the PHP mail() function. After a while the server is in testing period, I encounter a slowness when trying to post/insert into the database(that's also one of the jail). Further investigation, I found that in my web server log (/var/log/messages) with the following warning (even the sendmail is still functioning) :

Jan 13 16:25:44 httpd-2-server sendmail[46097]: unable to qualify my own domain name (httpd-2-server) -- using short name

Jan 13 16:25:49 httpd-2-server sm-mta[46118]: o0DGPi16046116: SYSERR(root): hash map "Alias0": missing map file /etc/mail/aliases.db: No such file or directory

For the "unable to qualify my own domain name (httpd-2-server) -- using short name", I resolve through setting up the /etc/hosts with something like this :

::1 localhost httpd-2-server.local
127.0.0.1 localhost httpd-2-server.local
192.168.1.3 httpd-2-putera httpd-2-putera.local

and for the ""Alias0": missing map file /etc/mail/aliases.db: No such file or directory", I resolve by issue this command :

shell>sendmail -bi
/etc/mail/aliases: 27 aliases, longest 10 bytes, 275 bytes total

If you wondering what the -bi is, I get this from the man pages

-bi Initialize the alias database.

and yes, the issue is resolve :)
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