[Solved] Postfix dsn=4.3.0, status=deferred (mail transport unavailable)

[Blisk]

I also have this problem and don't know what is wrong.
Mail just cant come in, they are stuck in queue.
If I send mail to myaself on the same domain than I get domain, from otuside I can't get any email
And didn't changed anything on postfix or dovecot.
when mail come in I get this error

Jul 17 19:41:32 ej postfix/error[15376]: A344AC0102A87: to=<myname@ej.net>, relay=none, delay=141074, delays=141069/5.3/0/0.22, dsn=4.3.0, status=deferred (mail transport unavailable)

I searched on net but can't find any solution for this.

[aks]

Presumably this is the output of mailq?

The clue lies in mail transport unavailable

As mail is very complex these days, Google it (I did and got several top hits that seem reasonable).

[Blisk]

Thanks.
I google it for this error and tried everything I found out about it and nothing helps.
Mails are stuck in queue and doesn't go out.

[Blisk]

I have now more than 2050 emails in queue and can't get it in my inbox

[mghe]

Could you show config of postfix?

Do you have other services for mail, eg. spamassasin, amavis-new or other?

[Blisk]

here is postconf -n

alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
allow_min_user = no
allow_percent_hack = no
biff = no
body_checks = pcre:/etc/postfix/body_checks.pcre
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = amavis:[127.0.0.1]:10024
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5
disable_vrfy_command = yes
dovecot_destination_recipient_limit = 1
enable_original_recipient = no
header_checks = pcre:/etc/postfix/header_checks
inet_interfaces = all
inet_protocols = all
lmtp_tls_mandatory_protocols = !SSLv2 !SSLv3
lmtp_tls_protocols = !SSLv2 !SSLv3
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
message_size_limit = 15728640
mydestination = localhost.$mydomain, localhost, mail.mydomain.net
mydomain = mydomain.net
myhostname = mydomain.net
mynetworks = 127.0.0.1
myorigin = mydomain.net
newaliases_path = /usr/bin/newaliases.postfix
postscreen_access_list = permit_mynetworks, cidr:/etc/postfix/postscreen_access.cidr
postscreen_blacklist_action = enforce
postscreen_dnsbl_action = enforce
postscreen_dnsbl_reply_map = texthash:/etc/postfix/postscreen_dnsbl_reply
postscreen_dnsbl_sites = zen.spamhaus.org*3 b.barracudacentral.org*2
postscreen_dnsbl_threshold = 2
postscreen_greet_action = enforce
proxy_read_maps = $canonical_maps $lmtp_generic_maps $local_recipient_maps $mydestination $mynetworks $recipient_bcc_maps $recipient_canonical_maps $relay_domains $relay_recipient_maps $relocated_maps $sender_bcc_maps $sender_canonical_maps $smtp_generic_maps $smtpd_sender_login_maps $transport_maps $virtual_alias_domains $virtual_alias_maps $virtual_mailbox_domains $virtual_mailbox_maps $smtpd_sender_restrictions $sender_dependent_relayhost_maps
queue_directory = /var/spool/postfix
recipient_bcc_maps = proxy:mysql:/etc/postfix/mysql/recipient_bcc_maps_user.cf proxy:mysql:/etc/postfix/mysql/recipient_bcc_maps_domain.cf
recipient_delimiter = +
relay_domains = $mydestination proxy:mysql:/etc/postfix/mysql/relay_domains.cf
sender_bcc_maps = proxy:mysql:/etc/postfix/mysql/sender_bcc_maps_user.cf proxy:mysql:/etc/postfix/mysql/sender_bcc_maps_domain.cf
sender_dependent_relayhost_maps = proxy:mysql:/etc/postfix/mysql/sender_dependent_relayhost_maps.cf
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtp-amavis_destination_recipient_limit = 1
smtp_tls_CAfile = $smtpd_tls_CAfile
smtp_tls_loglevel = 1
smtp_tls_mandatory_protocols = !SSLv2 !SSLv3
smtp_tls_note_starttls_offer = yes
smtp_tls_protocols = !SSLv2 !SSLv3
smtp_tls_security_level = may
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_end_of_data_restrictions = check_policy_service inet:127.0.0.1:7777
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks permit_sasl_authenticated reject_non_fqdn_helo_hostname reject_invalid_helo_hostname check_helo_access pcre:/etc/postfix/helo_access.pcre
smtpd_recipient_restrictions = reject_unknown_recipient_domain reject_non_fqdn_recipient reject_unlisted_recipient check_policy_service inet:127.0.0.1:7777 permit_mynetworks permit_sasl_authenticated reject_unauth_destination
smtpd_reject_unlisted_recipient = yes
smtpd_reject_unlisted_sender = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/dovecot-auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_login_maps = proxy:mysql:/etc/postfix/mysql/sender_login_maps.cf
smtpd_sender_restrictions = reject_unknown_sender_domain reject_non_fqdn_sender reject_unlisted_sender permit_mynetworks permit_sasl_authenticated check_sender_access pcre:/etc/postfix/sender_access.pcre
smtpd_tls_CAfile = /etc/letsencrypt/live/mydomain.net/chain.pem
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/letsencrypt/live/mydomain.net/cert.pem
smtpd_tls_dh1024_param_file = /etc/pki/tls/dh2048_param.pem
smtpd_tls_dh512_param_file = /etc/pki/tls/dh512_param.pem
smtpd_tls_exclude_ciphers = aNULL, eNULL, EXPORT, DES, RC4, MD5, PSK, aECDH, EDH-DSS-DES-CBC3-SHA, EDH-RSA-DES-CDC3-SHA, KRB5-DE5, CBC3-SHA
smtpd_tls_key_file = /etc/letsencrypt/live/mydomain.net/privkey.pem
smtpd_tls_loglevel = 1
smtpd_tls_mandatory_protocols = !SSLv2 !SSLv3
smtpd_tls_protocols = !SSLv2 !SSLv3
smtpd_tls_security_level = may
swap_bangpath = no
tls_random_source = dev:/dev/urandom
transport_maps = proxy:mysql:/etc/postfix/mysql/transport_maps_user.cf proxy:mysql:/etc/postfix/mysql/transport_maps_domain.cf
unknown_local_recipient_reject_code = 550
virtual_alias_domains =
virtual_alias_maps = mysql:/etc/postfix/mysql/virtual_alias_maps.cf
virtual_gid_maps = static:2000
virtual_mailbox_base = /var/vmail
virtual_mailbox_domains = mysql:/etc/postfix/mysql/virtual_mailbox_domains.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql/virtual_mailbox_maps.cf
virtual_minimum_uid = 2000
virtual_transport = dovecot
virtual_uid_maps = static:2000

[Blisk]

Ok I am now a bit closer to problem.
It is amavis which makes problem I have disabled it in main.cf
#content_filter = amavis:[127.0.0.1]:10026
#smtp-amavis_destination_recipient_limit = 1

and now I can get mails to inbox.
How can I check what is a problem with amavis so that it doesn't work with postfix?
I also tried to change 10026 to 10024 and no changes still not working, when amavis enabled.

[aks]

[127.0.0.1]:10026

Isn't that a socket? Is amavis listening there?

[Blisk]

yes I disabled that in postfix, that means something is wrong related amavis.

[mghe]

Check in maillog:

# grep amavis /var/log/maillog* | less

and change log level for more info:

/etc/amavisd/amavisd.conf

$log_level = 0; # verbosity 0..5, -d