Question about line length limit in lmtp.

[Gedalya]

On 12/8/22 17:41, Aki Tuomi wrote:
> This is something that is usually handled automatically and does not affect the mails you see in your MUA. The folding is done within the protocol.

Again, I find this statement quite strange. I'm not relying on any MUA when I say long lines appear to be kept unfolded in storage.

The scenario is an MTA e.g. exim delivering mail with long lines to dovecot LMTP. If you're saying I'm definitely wrong then I'd have to test again.

As for submission, are you saying that if a client is submitting mail with long lines, submission will fold the lines before passing it on? And this would make sense because DKIM signing occurs later?