Re: resending bounces: DKIM and Message-ID:

[Emanuel Berg <incal@dataswamp.org>]

Greg Troxel wrote:

> I found a behavior problem that I think is a bug in both
> gnus and opendkim. Headers that are supposed to be added by
> the originating MTA are not removed, so the resent message
> has odd content: duplicate DKIM header, and the same
> Message-ID

Not an answer to your situation but FWIW I had problems with
DKIM in the past, I don't remember how I solved it but here
are a bunch of commands and URLs related to that whole thing:

#! /bin/zsh
#
# this file:
#   https://dataswamp.org/~incal/conf/.zsh/mail
#
# DMARC issue:
#   https://en.wikipedia.org/wiki/DMARC
#   https://mailarchive.ietf.org/arch/msg/ietf/kL24edUthAOuHuwK3ZnpFkCXduI
#
# discussion and commands:
#   http://lists.gnu.org/archive/html/help-gnu-emacs/2019-05/msg00476.html
#   http://lists.gnu.org/archive/html/help-gnu-emacs/2019-05/msg00477.html
#   http://lists.gnu.org/archive/html/help-gnu-emacs/2019-05/msg00481.html
#
# (rfc 7489)
#   "Domain-based Message Authentication, Reporting, and Conformance (DMARC)"
#   <https://datatracker.ietf.org/doc/html/rfc7489>
#
# (rfc 8616)
#   "Email Authentication for Internationalized Mail"
#   <https://datatracker.ietf.org/doc/html/rfc8616>

dig-srv () {
    local srv=$1
    nslookup -type=mx $srv
    dig $srv mx
}

DMARK_ZOHO=_dmarc.zoho.eu

dig-zoho () {
    dig $DMARK_ZOHO txt +short
}

host-zoho () {
    host -t txt $DMARK_ZOHO
}

test-zoho () {
    local server=pop.zoho.com
    local port=995
    local server_port=${server}:${port}

    echo "socat"
    socat - OPENSSL:${server_port}

    echo "\nopenssl"
    openssl s_client -quiet -connect $server_port

    echo "\ngutls-cli"
    gnutls-cli --port $port $server
}

-- 
underground experts united
https://dataswamp.org/~incal