Thank you very much for the responses!
This is a small, personal setup with low traffic so I will definitely
explore using notify_classes to try to get more feedback on the failures.
Remote server legitmacy - *.dbsintl.net appears to be a third party hosting
solution for small businesses. In the example provided before, I can
correlate the timestamps in my mail.log to attempts to generate e-mails from
a particular website to myself (e.g. updating my e-mail address, etc.).
Coupled with the failure to receive mail from nabble, I have to assume the
problem is on my end.
Here's the output from postconf -n (with my server/domain names redacted):
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
canonical_maps = hash:/etc/postfix/canonical
default_destination_concurrency_limit = 5
disable_vrfy_command = yes
dovecot_destination_recipient_limit = 1
header_checks = regexp:/etc/postfix/header_checks
home_mailbox = Maildir/
inet_interfaces = all
mailbox_command = /usr/lib/dovecot/deliver -c
/etc/dovecot/conf.d/01-mail-stack-delivery.conf -m "${EXTENSION}"
mailbox_size_limit = 0
message_size_limit = 104857600
milter_connect_macros = j {daemon_name} v {if_name} _
milter_default_action = accept
mydestination = localhost, <myserver>.<mydomain>.net,
localhost.<mydomain>.net
myhostname = <myserver>.<mydomain>.net
mynetworks = 127.0.0.0/8 192.168.0.0/24 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = /etc/mailname
non_smtpd_milters = $smtpd_milters
postscreen_access_list = permit_mynetworks
postscreen_dnsbl_action = enforce
postscreen_dnsbl_sites = zen.spamhaus.org, b.barracudacentral.org,
bl.spamcop.net
postscreen_greet_action = enforce
readme_directory = no
recipient_delimiter = +
relay_destination_concurrency_limit = 1
relayhost =
sender_whitelist = check_client_access
hash:/etc/postfix/check_client_access, reject
smtp_tls_note_starttls_offer = yes
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks, permit
smtpd_milters = unix:/opendkim/opendkim.sock, inet:localhost:54321,
unix:/spamass/spamass.sock
smtpd_recipient_restrictions = check_policy_service unix:private/policy-spf,
reject_unknown_recipient_domain, reject_unauth_pipelining,
permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_restriction_classes = sender_whitelist
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_path = private/dovecot-auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_login_maps = mysql:/etc/postfix/mysql/virtual_mailbox_maps.cf
smtpd_sender_restrictions = reject_sender_login_mismatch
smtpd_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
smtpd_tls_ask_ccert = yes
smtpd_tls_auth_only = yes
smtpd_tls_cert_file =
/etc/ssl/private/ssl-chain-mail-<myserver>.<mydomain>.net.pem
smtpd_tls_ciphers = high
smtpd_tls_key_file =
/etc/ssl/private/<myserver>-decrypted-mail-<mydomain>.net.key
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_security_level = encrypt
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom
unknown_address_reject_code = 550
unknown_client_reject_code = 550
unknown_hostname_reject_code = 550
virtual_alias_maps = mysql:/etc/postfix/mysql/virtual_alias_maps.cf
virtual_gid_maps = static:5000
virtual_mailbox_domains = mysql:/etc/postfix/mysql/virtual_domains_maps.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql/virtual_mailbox_maps.cf
virtual_transport = lmtp:unix:private/dovecot-lmtp
virtual_uid_maps = static:5000
--
Sent from: http://postfix.1071664.n5.nabble.com/Postfix-Users-f2.html
