Mar 28 09:26:31 mail postfix/smtpd[8668]: connect from localhost.localdomain[127.0.0.1]
Mar 28 09:26:31 mail postfix/trivial-rewrite[8670]: warning: do not list domain mpt.gov.la in BOTH mydestination and virtual_mailbox_domains
Mar 28 09:26:31 mail postfix/smtpd[8668]: 54F49E9022F: client=localhost.localdomain[127.0.0.1], sasl_method=LOGIN, sasl_username=souvanny@mpt.gov.la
Mar 28 09:26:31 mail postfix/cleanup[8671]: 54F49E9022F: message-id=<286da807b1de0f9f3dfdc6a61c064ec9@mpt.gov.la>
Mar 28 09:26:31 mail postfix/qmgr[8387]: 54F49E9022F: from=<souvanny@mpt.gov.la>, size=547, nrcpt=1 (queue active)
Mar 28 09:26:31 mail postfix/qmgr[8387]: warning: connect to transport amavis: No such file or directory
Mar 28 09:26:31 mail roundcube: User souvanny@mpt.gov.la [202.123.179.122]; Message for souvanny@mpt.gov.la; 250: 2.0.0 Ok: queued as 54F49E9022F
Mar 28 09:26:31 mail postfix/error[8673]: 54F49E9022F: to=<souvanny@mpt.gov.la>, relay=none, delay=0.06, delays=0.05/0/0/0.01, dsn=4.3.0, status=deferred (mail transport unavailable)
Mar 28 09:26:31 mail postfix/smtpd[8668]: disconnect from localhost.localdomain[127.0.0.1]

i use  postsuper -r ALL we have any message and i use postqueue -f to refresh queue mail and we can receive/send at the moment after that we have (mail transport unavailable) messages again

Help me pleas