Setting up a new installation of ispconfig 3.1.2, dovecot, and postfix as outlined in the how-to documentation. /perfect-server-centos-6.4-x86_64-nginx-dovecot-ispconfig-3-p4 I'm about at my wit's end. Most things are operational. LEMP stack with ispconfig. Everything works well except mail. Forums can send out mail but it's a big no-go with clients. Not that my knowledge is all that great with other server aspects, but this is all new territory for me setting up mail services. Dumb as a fence post you might say. When trying to login squirrelmail, this shows in the error log: Feb 902:57:55 postfix/smtpd: warning: SASL:Connect to private/auth failedermission denied Feb 902:57:55 postfix/smtpd: fatal:no SASL authentication mechanisms Feb 902:57:56 postfix/master: warning: process /usr/libexec/postfix/smtpd pid 21547exit status 1 Feb 902:57:56 postfix/master: warning:/usr/libexec/postfix/smtpd: bad command startup -- throttling Here's a sample from the error logs: Logging in by command line this happens: telnet localhost 143 Trying::1... Connected to localhost. Escape character is'^]'. * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE STARTTLS AUTH=PLAIN]Dovecot ready. a login [email protected] a NO [AUTHENTICATIONFAILED]Authentication failed. And in the error log: Feb 902:58:24 dovecot: imap-loginisconnected:Inactivity(auth failed,1 attempts): user=<[email protected] Please help! Again, I'm new to all this. I have no idea where to go from here. Thanks!!