I have followed this tutorial http://www.howtoforge.com/centos-5.1...-ftp-ispconfig
at the end i have installed SquirrelMail (not ispconfig, i don't need it), but i have a problem...i can't send mail to my server...
SMTP error from remote mail server after RCPT TO:<email@example.com>:
host webmail.mydomain.tld [xx.xxx.xx.xx]:
554 5.7.1 <firstname.lastname@example.org>: Relay access denied