Hi I have a postfix3-3.2.4-1.gf.el7.x86_64 and centos 7.5 - all works fine I use distributed services: one machine to incomming and one for outgoing
(I serach answers in this group but without a clear answer) Some times i found in logs (smtp outgoing) empty message-id like Feb 5 12:20:18 smtp1 postfix/cleanup[21270]: 48CJy70T20z3xcS: message-id=<> Feb 5 12:20:20 smtp1 postfix/cleanup[21265]: 48CJyD3tzNz3y0m: message-id=<> Feb 5 12:20:20 smtp1 postfix/cleanup[19334]: 48CJyD4yKCz3xvB: message-id=<> Feb 5 12:20:23 smtp1 postfix/cleanup[19285]: 48CJyH2nYjz3y1b: message-id=<> Feb 5 12:20:24 smtp1 postfix/cleanup[17592]: 48CJyH6tV0z3xNL: message-id=<> Feb 5 12:20:25 smtp1 postfix/cleanup[19334]: 48CJyK1Yg7z3y2C: message-id=<> In rfc 822 message-id is not required but I dont known why some times i get message-id and sometimes not and what it depends on in main.cf: ..... compatibility_level = 2 smtputf8_enable = no enable_long_queue_ids = yes in_flow_delay = 2s .... example log: http://paste.debian.net/1129241/ -- Sent from: http://postfix.1071664.n5.nabble.com/Postfix-Users-f2.html