I use ISPconfig 3.0.5.2 on Debian 7.0 and Mysql 5.5.30+dfsg-1.1, postfix 2.9.6-2, courier 0.68.2-1 . Since yesterday incoming mails are rejected and I cannot send emails because I get an authentication error. I can however login to imap mailboxes. Logs: Trying to send a mail in auth.log Code: May 10 12:54:02 BLANKED postfix/smtpd[8448]: sql plugin could not connect to host 127.0.0.1 May 10 12:54:02 BLANKED postfix/smtpd[8448]: sql plugin couldn't connect to any host May 10 12:55:01 BLANKED mysqld[5718]: refused connect from 127.0.0.1 An incomming mail event in mail.log Code: May 10 13:08:29 BLANKED postfix/smtpd[8725]: connect from smtpout.howtoforge.com[78.47.44.38] May 10 13:08:29 BLANKED postfix/trivial-rewrite[8813]: warning: proxy:mysql:/etc/postfix/mysql-virtual_domains.cf: table lookup problem May 10 13:08:29 BLANKED postfix/trivial-rewrite[8813]: warning: virtual_mailbox_domains lookup failure May 10 13:08:29 BLANKED postfix/smtpd[8725]: warning: mysql:/etc/postfix/mysql-virtual_client.cf: table lookup problem May 10 13:08:29 BLANKED postfix/smtpd[8725]: NOQUEUE: reject: RCPT from smtpout.howtoforge.com[78.47.44.38]: 451 4.3.5 <smtpout.howtoforge.com[78.47.44.38]>: Client host rejected: Server configuration error; from=<[email protected]> to=<BLANKED> proto=ESMTP helo=<smtpout.howtoforge.com> May 10 13:08:29 BLANKED postfix/smtpd[8725]: disconnect from smtpout.howtoforge.com[78.47.44.38] Weird thing: When I try to login with Code: mysql -u *user* -p and use the credentials stored in the *.cf files of the postfix configuration, I can login, change to the specified database and place a query. Any help is appreciated. P.S.: I already set max_connections and max_user_connections to 500 in the mysql config.
good to see it's fixed. Would be nice if you post the solution here so if someone else has the same problem he/she can fix it too
you're right. I was a bit upset nobody would respond to my requests - I had one or two more questions in separate threads. Anyway, in this case localhost got blacklisted by denyhost in /etc/hosts.deny - funny, isn't it? I added 127.0.0.1 to /etc/hosts.allow - that solved it but I still have not figured how that happened.
