I need to send emails that are much larger than 100GB.
So I have changed the maximum size in Postfix to around 2TB. I store these massive mails on a SMB share from my NAS.
When sending mails I now get the message “452 4.3.1 Insufficient system storage”.
I found out that the local storage is the problem. When I set the message_size_limit above the storage of my local disk, no mail goes out and none comes in. Probably has something to do with the fact that mails are stored temporarily on the local disk. So is there an option to save directly to the NAS, or to move the cache to the NAS.
I don’t want to increase the allocated SSD storage to send mails over 100GB …
Hope someone can help me and maybe have the same problem 🙂