Can’t attach a file larger than 500 KB to a message

Mutual Help
1

Hi. I use a self-hosted chatmail relay.
Before deploying, I edited chatmail.ini:
max_message_size = 104857600
Now, when I try to attach a file larger than 500 KB to a message I get the postfix error “proxy-reject: END-OF-MESSAGE: 523 Encryption Needed: Invalid Unencrypted Mail”.
However, when I attach a file smaller than 500 KB to a message it attaches correctly.
How can I resolve this problem?

2

Which version of the relay do you run? It is available in /etc/chatmail-version.

3

There is no such file on the server.
I use relay version 1.6.0.
It seems that this error has not previously appeared in version 1.6.0.
Perhaps it is caused by updating the components via apt update/upgrade.

4

This is fixed already, the change is “filtermail: allow partial body length in OpenPGP payloads” in the changelog. It is not in 1.6.0 however, but you can update to the latest main.

5

What is the best way to do this?

6

Update to the main branch by doing git pull and git checkout main, then re-run scripts/cmdeploy.

7

Thanks. Updating from the main branch helped.