Hi all,
and the next one.
One instance of a multiple instance setup of postfix is configured as
submission service, or at least i hope so. I can connect and
authenticate via dovecot SASL, and i can deliver mail. Postfix tries to
send it but fails:
2025-06-21T14:41:33.444019+02:00 bywater postfix-sub/smtp[863532]:
4160024007A: to=<x...@googlemail.com>, rel
ay=none, delay=67881, delays=67881/0.02/0/0, dsn=4.4.3, status=deferred
(Host or domain name not found. Name service err
or for name=googlemail.com type=MX: Host not found, try again)
The server can resolve the address, dig and nslookup work. Other postix
instances do not have the problem. But other instances have
/var/spool/postfix-instance/etc/resolv.conf which is missing for
postfix-sub.
I could copy /etc/resolv.conf manually, but that would only cure the
symptoms. What did i forget?
master.cf:
tlsproxy unix - - y - 0 tlsproxy
submission inet n - y - - smtpd
pickup unix n - y 60 1 pickup
cleanup unix n - y - 0 cleanup
qmgr unix n - n 300 1 qmgr
tlsmgr unix - - y 1000? 1 tlsmgr
rewrite unix - - y - - trivial-rewrite
bounce unix - - y - 0 bounce
defer unix - - y - 0 bounce
trace unix - - y - 0 bounce
verify unix - - y - 1 verify
flush unix n - y 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - y - - smtp
relay unix - - y - - smtp
-o syslog_name=postfix/$service_name
showq unix n - y - - showq
error unix - - y - - error
retry unix - - y - - error
discard unix - - y - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - y - - lmtp
anvil unix - - y - 1 anvil
scache unix - - y - 1 scache
postlog unix-dgram n - n - 1 postlogd
Most probably i could comment out a lot more lines but one step after
the other.
postconf -c /etc/postfix-sub/ -n:
alias_database =
alias_maps =
broken_sasl_auth_clients = yes
config_directory = .
data_directory = /var/lib/postfix-sub
inet_interfaces = 2a01:4f9:3b:25b0:9:6:1:e01,65.21.136.15
local_recipient_maps =
master_service_disable =
multi_instance_enable = yes
multi_instance_group = sub
multi_instance_name = postfix-sub
mydestination =
myhostname = mail.qno.de
mynetworks_style = host
myorigin = $mydomain
queue_directory = /var/spool/postfix-sub
smtp_tls_exclude_ciphers = aNULL
smtp_tls_loglevel = 1
smtp_tls_mandatory_ciphers = medium
smtp_tls_mandatory_exclude_ciphers = RC4, MD5, SHA1
smtp_tls_security_level = may
smtpd_banner = $myhostname ESMTP $mail_name
smtpd_client_restrictions = permit_sasl_authenticated, reject
smtpd_helo_restrictions = permit_mynetworks, reject_non_fqdn_hostname,
reject_invalid_hostname, permit
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous, noplaintext
smtpd_sasl_tls_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_restrictions = permit_sasl_authenticated, reject
smtpd_tls_auth_only = yes
smtpd_tls_eccert_file = /etc/letsencrypt/live/mail.qno.de/fullchain.pem
smtpd_tls_eckey_file = /etc/letsencrypt/live/mail.qno.de/privkey.pem
smtpd_tls_mandatory_ciphers = high
smtpd_tls_mandatory_exclude_ciphers = aNULL, MD5, SHA1
smtpd_tls_mandatory_protocols = >=TLSv1.2
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
syslog_name = postfix-sub
I googled a lot, but most solutions where "restart all services" which
does not help here. Any ideas how i can get postfix-sub/etc/resolv.conf?
TIA
QNo
_______________________________________________
Postfix-users mailing list -- postfix-users@postfix.org
To unsubscribe send an email to postfix-users-le...@postfix.org
