I'm a newbie in this thing constructing a mail server. So far I have successfully installed postfix and dovecot in centOS 6.4 and been sending and receiving mails locally .Now I'm tasked with the next problem which is that I need to send emails to other domains such as yahoo, and ofcourse receive mail from other server domains as well (but i know its a lot more complicated to receive mails from outside the local network because of IP issues).
BTW I'm using squirrelmail as a mail GUI for practice. When im sending emails to my yahoo account, squirrel mail shows me this error message
" Transaction failed
554 5.7.1 <email account here>: Relay access denied "
plus the maillog updates are always like this, even though im just checking the sent folder or inbox or whatsoever.
"May 8 09:14:10 krizna dovecot: imap-login: Login: user=<rolf>, method=PLAIN, rip=::1, lip=::1, mpid=3516, secured
May 8 09:14:10 krizna dovecot: imap(rolf): Disconnected: Logged out bytes=79/681"
What could be the source of the problem??
please I really need help on this