Re: [exim] DKIM: validation error: LONG_LINE

On 21/04/2021 20:37, Wayne via Exim-users wrote:
> Does this include lines in the body of the messages or just the headers?

Both. Body lines have to be processed for canonicalization before
adding into the hash value that becomes part of the signature.

The DKIM standard does not limit the permissible body line length,
but the Exim implementation does (to 16k -delta).

> I think the body of the message may voilate the limit, and of course,
> the message is generated by firmware so I won't be able to correct this.
> I was hoping EXIM would only examine header lines in order to sign the
> message.

Perhaps you could feed the messages through a processing stage
before the first DKIM signing?
--
Cheers,
Jeremy