Comment 44 for bug 1974214

So, the ARC thing is different.

Line 3781 is commented out.

remote_smtp:
  driver = smtp
.ifdef _HAVE_TLS_RESUME
  tls_resumption_hosts = *
.endif
  arc_sign = gedalya.net : rsa2 : /usr/exim/rsa2.key : timestamps
  dkim_domain = gedalya.net
  dkim_selector = rsa1
  dkim_private_key = /usr/exim/rsa1.key
  dkim_canon = relaxed
  dkim_sign_headers = From:Sender:Reply-To:Subject:Date:Message-ID:To:Cc:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-ID:Content-Description:=Resent-Date:=Resent-From:=Resent-Sender:=Resent-To:=Resent-Cc:=Resent-Message-ID:=In-Reply-To:=References:=List-Id:=List-Help:=List-Unsubscribe:=List-Subscribe:=List-Post:=List-Owner:=List-Archive

It crashes if all of the following conditions are met:

- TLS is used (no hosts_avoid_tls = *)
- First connection deferred
- DKIM signing is done
- ARC signing is done

Local/Makefile:

BIN_DIRECTORY=/usr/exim/bin
CONFIGURE_FILE=/usr/exim/configure
EXIM_USER=mail
SPOOL_DIRECTORY=/var/spool/exim
USE_GNUTLS=yes
USE_GNUTLS_PC=gnutls gnutls-dane
#USE_OPENSSL=yes
#USE_OPENSSL_PC=openssl
ROUTER_ACCEPT=yes
ROUTER_DNSLOOKUP=yes
ROUTER_IPLITERAL=yes
ROUTER_MANUALROUTE=yes
ROUTER_QUERYPROGRAM=yes
ROUTER_REDIRECT=yes
TRANSPORT_APPENDFILE=yes
TRANSPORT_AUTOREPLY=yes
TRANSPORT_PIPE=yes
TRANSPORT_SMTP=yes
LOOKUP_DBM=yes
LOOKUP_LSEARCH=yes
LOOKUP_DNSDB=yes
PCRE2_CONFIG=yes
SUPPORT_DANE=yes
DISABLE_MAL_AVE=yes
DISABLE_MAL_KAV=yes
DISABLE_MAL_MKS=yes
EXPERIMENTAL_ARC=yes
FIXED_NEVER_USERS=root
AUTH_CRAM_MD5=yes
HEADERS_CHARSET="ISO-8859-1"
SYSLOG_LOG_PID=yes
EXICYCLOG_MAX=10
COMPRESS_COMMAND=/usr/bin/gzip
COMPRESS_SUFFIX=gz
ZCAT_COMMAND=/usr/bin/zcat
SUPPORT_SPF=yes
LDFLAGS += -lspf2
SYSTEM_ALIASES_FILE=/etc/aliases
EXIM_TMPDIR="/tmp"