Re: [exim] Dkim error LONG_LINE

On 28 Apr 2021, at 9:22, SysAdmin EM via Exim-users wrote:

> Could you tell me how to solve the problem? or what documentation to
> read?

You need to fix whatever is generating the mail so that it stops sending
mail with such long lines. The most reliable way to do that is simply to
make it use Base64 or Quoted-Printable encoding rather than allowing it
to attempt to send raw arbitrary binary data. If the sender is not under
your control or you cannot configure it to use a particular encoding,
you may be able to get Exim to sign al it to do so by excluding the
sending host from the chunking_advertise_hosts list. To exclude all
senders, just add 'chunking_advertise_hosts=""' to your exim.conf file.
You may also want to consider 'smtputf8_advertise_hosts=""'. Both of
those SMTP extensions have interoperability problems and if your MTA
doesn't advertise support, most senders will perform the necessary
encoding of messages into a traditional format.

--
Bill Cole
bill@??? or billcole@???
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire