Administrators • my zimbra suddenly cannot send and receive mail

Code:

Release 8.7.11_GA_1854.RHEL7_64_20170531151956 RHEL7_64 FOSS edition.Dec  5 14:01:50 mail postfix/smtpd[5842]: warning: private/proxymap socket: service dict_proxy_open: Connection reset by peerDec  5 14:01:50 mail postfix/master[4841]: warning: process /opt/zimbra/common/libexec/proxymap pid 6401 killed by signal 11Dec  5 14:01:50 mail postfix/master[4841]: warning: /opt/zimbra/common/libexec/proxymap: bad command startup -- throttlingDec  5 14:01:50 mail postfix/postscreen[5841]: CONNECT from [127.0.0.1]:44770 to [127.0.0.1]:25Dec  5 14:01:50 mail postfix/postscreen[5841]: WHITELISTED [127.0.0.1]:44770Dec  5 14:01:55 mail postfix/postscreen[5841]: PASS NEW [35.202.9.133]:52090Dec  5 14:02:00 mail postfix/postscreen[5841]: CONNECT from [103.30.189.50]:59584 to [103.30.189.50]:25Dec  5 14:02:00 mail postfix/postscreen[5841]: WHITELISTED [103.30.189.50]:59584Dec  5 14:02:00 mail postfix/postqueue[5950]: fatal: malformed showq server responseDec  5 14:02:00 mail postfix/master[4841]: warning: process /opt/zimbra/common/libexec/showq pid 6407 killed by signal 11Dec  5 14:02:00 mail postfix/master[4841]: warning: /opt/zimbra/common/libexec/showq: bad command startup -- throttlingDec  5 14:02:10 mail postfix/postscreen[5841]: CONNECT from [103.30.189.50]:59594 to [103.30.189.50]:25Dec  5 14:02:10 mail postfix/postscreen[5841]: WHITELISTED [103.30.189.50]:59594Dec  5 14:02:14 mail postfix/postscreen[5841]: CONNECT from [103.20.189.50]:57940 to [103.30.189.50]:25Dec  5 14:02:14 mail postfix/postscreen[5841]: WHITELISTED [103.20.189.50]:57940Dec  5 14:02:14 mail postfix/postscreen[5841]: CONNECT from [103.20.189.50]:57938 to [103.30.189.50]:25Dec  5 14:02:14 mail postfix/postscreen[5841]: WHITELISTED [103.20.189.50]:57938Dec  5 14:02:14 mail postfix/postscreen[5841]: CONNECT from [103.20.189.50]:57942 to [103.30.189.50]:25Dec  5 14:02:14 mail postfix/postscreen[5841]: WHITELISTED [103.20.189.50]:57942Dec  5 14:02:14 mail postfix/postscreen[5841]: CONNECT from [103.20.189.50]:57944 to [103.30.189.50]:25Dec  5 14:02:14 mail postfix/postscreen[5841]: WHITELISTED [103.20.189.50]:57944Dec  5 14:02:14 mail postfix/postscreen[5841]: CONNECT from [103.20.189.50]:57946 to [103.30.189.50]:25Dec  5 14:02:14 mail postfix/postscreen[5841]: WHITELISTED [103.20.189.50]:57946Dec  5 14:02:20 mail postfix/postscreen[5841]: CONNECT from [127.0.0.1]:44788 to [127.0.0.1]:25Dec  5 14:02:20 mail postfix/postscreen[5841]: WHITELISTED [127.0.0.1]:44788Dec  5 14:02:30 mail postfix/postscreen[5841]: warning: timeout sending connection to service private/smtpdDec  5 14:02:30 mail postfix/postscreen[5841]: CONNECT from [127.0.0.1]:44792 to [127.0.0.1]:25Dec  5 14:02:30 mail postfix/postscreen[5841]: WHITELISTED [127.0.0.1]:44792Dec  5 14:02:40 mail postfix/postscreen[5841]: warning: timeout sending connection to service private/smtpdDec  5 14:02:40 mail postfix/postscreen[5841]: CONNECT from [103.30.189.50]:59608 to [103.30.189.50]:25Dec  5 14:02:40 mail postfix/postscreen[5841]: WHITELISTED [103.30.189.50]:59608Dec  5 14:02:40 mail postfix/master[4841]: warning: process /opt/zimbra/common/libexec/pickup pid 6424 killed by signal 11Dec  5 14:02:40 mail postfix/master[4841]: warning: /opt/zimbra/common/libexec/pickup: bad command startup -- throttlingDec  5 14:02:43 mail zmconfigd[1808]: Fetching All configsDec  5 14:02:43 mail zmconfigd[1808]: All configs fetched in 0.13 secondsDec  5 14:02:47 mail zmconfigd[1808]: Watchdog: service antivirus status is OK.Dec  5 14:02:47 mail zmconfigd[1808]: All rewrite threads completed in 0.01 secDec  5 14:02:47 mail zmconfigd[1808]: All restarts completed in 0.00 secDec  5 14:02:50 mail postfix/postscreen[5841]: warning: timeout sending connection to service private/smtpdDec  5 14:02:50 mail postfix/master[4841]: warning: process /opt/zimbra/common/libexec/proxymap pid 6872 killed by signal 11Dec  5 14:02:50 mail postfix/smtps/smtpd[5944]: warning: private/proxymap socket: service dict_proxy_open: Connection reset by peerDec  5 14:02:50 mail postfix/master[4841]: warning: /opt/zimbra/common/libexec/proxymap: bad command startup -- throttlingDec  5 14:02:50 mail postfix/postscreen[5841]: CONNECT from [103.30.189.50]:59620 to [103.30.189.50]:25Dec  5 14:02:50 mail postfix/postscreen[5841]: WHITELISTED [103.30.189.50]:59620Dec  5 14:03:00 mail postfix/postscreen[5841]: warning: timeout sending connection to service private/smtpdDec  5 14:03:01 mail postfix/postqueue[6422]: fatal: malformed showq server responseDec  5 14:03:01 mail postfix/master[4841]: warning: process /opt/zimbra/common/libexec/showq pid 6880 killed by signal 11Dec  5 14:03:01 mail postfix/master[4841]: warning: /opt/zimbra/common/libexec/showq: bad command startup -- throttlingDec  5 14:03:01 mail postfix/postscreen[5841]: CONNECT from [127.0.0.1]:44820 to [127.0.0.1]:25Dec  5 14:03:01 mail postfix/postscreen[5841]: WHITELISTED [127.0.0.1]:44820Dec  5 14:03:10 mail postfix/postscreen[5841]: warning: timeout sending connection to service private/smtpdDec  5 14:03:11 mail postfix/postscreen[5841]: CONNECT from [127.0.0.1]:44822 to [127.0.0.1]:25Dec  5 14:03:11 mail postfix/postscreen[5841]: WHITELISTED [127.0.0.1]:44822Dec  5 14:03:20 mail postfix/postscreen[5841]: warning: timeout sending connection to service private/smtpdDec  5 14:03:21 mail postfix/postscreen[5841]: CONNECT from [103.30.189.50]:59642 to [103.30.189.50]:25Dec  5 14:03:21 mail postfix/postscreen[5841]: WHITELISTED [103.30.189.50]:59642Dec  5 14:03:30 mail postfix/postscreen[5841]: warning: timeout sending connection to service private/smtpdDec  5 14:03:31 mail postfix/postscreen[5841]: CONNECT from [103.30.189.50]:59646 to [103.30.189.50]:25Dec  5 14:03:31 mail postfix/postscreen[5841]: WHITELISTED [103.30.189.50]:59646