Hi together,
I´m using Mailman3.3.9 and postfix in docker containers seperatly. Everything worked fine since this afternoon.
The error occurs, after postfix transports an incoming mail to mailman. After processing the mail, sending to all recepients failed
Delivery to mail@domain.tld failed with code 444, [Errno 111] Connection refused I checked the configuration of postfix and added a wide IP-range to mynetworks:
postfix-main.cf mynetworks = mailman-core tgc_mailman_core t 127.0.0.0/8 [::1]/128 [fe80::]/64 172.18.0.0/16 172.21.0.0/16 [2001:8d8:1800:283]/64 172.0.0.0/24 relay_domains = $mydestination #smtpd_sender_restrictions = reject_unknown_sender_domain,reject_unknown_reverse_client_hostname smtpd_sender_restrictions = reject_unknown_sender_domain smtpd_relay_restrictions = permit_mynetworks,permit_sasl_authenticated,reject_unauth_destination smtpd_recipient_restrictions = permit_sasl_authenticated check_recipient_access hash:/etc/postfix/filtered_domains permit_mynetworks reject_unauth_destination smtpd_data_restrictions = reject_unauth_pipelining
Does anyone have a clue for me as to why delivery to Postfix is failing?
My last change a couple of days ago was adding an public ipv6-address to the host. But docker still works without IPv6. I thought about client-identification issues between maiolman-core and postfix but did noch find anything to fix ...
Best regards, Christopher