1

Topic: errors....

Jul 17 20:19:01 mail postfix/qmgr[6997]: warning: private/smtp socket: malformed response
Jul 17 20:19:01 mail postfix/master[6994]: warning: process /usr/libexec/postfix/smtp pid 7819 exit status 1
Jul 17 20:19:01 mail postfix/qmgr[6997]: warning: transport smtp failure -- see a previous warning/fatal/panic logfile record for the problem description
Jul 17 20:19:01 mail postfix/master[6994]: warning: /usr/libexec/postfix/smtp: bad command startup -- throttling

2

Re: errors....

Please post log content before and after these lines.

3

Re: errors....

Jul 18 01:23:10 mail postfix/smtpd[10061]: disconnect from unknown[74.84.130.72]
Jul 18 01:23:42 mail postfix/smtpd[9990]: connect from unknown[148.223.42.84]
Jul 18 10:23:42 mail postfix/proxymap[10040]: warning: mysql query failed: MySQL server has gone away
Jul 18 10:23:42 mail postfix/trivial-rewrite[10039]: fatal: proxy:mysql:/etc/postfix/mysql/virtual_mailbox_domains.cf(0,lock|fold_fix): table lookup problem
Jul 18 01:23:43 mail postfix/smtpd[10061]: connect from unknown[74.84.131.154]
Jul 18 10:23:43 mail postfix/master[2749]: warning: process /usr/libexec/postfix/trivial-rewrite pid 10039 exit status 1
Jul 18 10:23:43 mail postfix/proxymap[10040]: warning: mysql query failed: MySQL server has gone away
Jul 18 10:23:43 mail postfix/trivial-rewrite[10284]: fatal: proxy:mysql:/etc/postfix/mysql/virtual_mailbox_domains.cf(0,lock|fold_fix): table lookup problem
Jul 18 10:23:44 mail postfix/trivial-rewrite[10285]: fatal: proxy:mysql:/etc/postfix/mysql/virtual_mailbox_domains.cf(0,lock|fold_fix): table lookup problem
Jul 18 10:23:44 mail postfix/master[2749]: warning: process /usr/libexec/postfix/trivial-rewrite pid 10284 exit status 1
Jul 18 01:23:45 mail postfix/smtpd[9990]: warning: problem talking to service rewrite: Success
Jul 18 10:23:45 mail postfix/master[2749]: warning: process /usr/libexec/postfix/trivial-rewrite pid 10285 exit status 1
Jul 18 10:23:45 mail postfix/master[2749]: warning: /usr/libexec/postfix/trivial-rewrite: bad command startup -- throttling

4

Re: errors....

tim wrote:

Jul 18 10:23:42 mail postfix/proxymap[10040]: warning: mysql query failed: MySQL server has gone away

It's clear here, your MySQL server is not running. Starting MySQL should fix this issue.