> More likely you have a mailbox size limit smaller than the message > size limit.
Yes, that's the reason. I completely forgot to check the matching between both settings. The mailbox size limit was set to its default value of 50 Mb. After setting it to 150 Mb, the issue was fixed. Note: the bounce copies sent to the postmaster were the only one impacted by this issue, because the only ones delivered to a local mailbox (server role is a pure MTA). Thanks to have pointing this out :) Postfix feature request: that would be nice that Postfix be able to do this kind of basic checks by itself when starting (or when configuration is reloaded) between various inter-dependent configuration settings, and display in the logs at least some warnings when such kind of issue is detected :) Best regards, Nicolas ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.
