On 14-10-2020 14:54, webadmin@exalt.com.au wrote:
I am investigating whether dovecot(https://github.com/dovecot/core/) handles case insensitive Message-ID headers as per RFC.
Again, Dovecot has nothing to do with this in the context. Fix your SMTP client and the problem will go away.
And you seem to have more than one issue to deal with, your email has failed the SPF check at my end and went straight into Junk because my server has received it from 103.27.34.234, which isn't listed in the TXT record for exalt.com.au:
---CUT HERE--- Authentication-Results: mx1.quick.net.au; spf=softfail (mailfrom) smtp.mailfrom=exalt.com.au (client-ip=103.27.34.234; helo=se6.syd.hostingplatform.net.au; envelope-from=webadmin@exalt.com.au; receiver=<UNKNOWN>) Received: from se6.syd.hostingplatform.net.au (se6.syd.hostingplatform.net.au [103.27.34.234]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) ---CUT HERE---
dig exalt.com.au txt +short "v=spf1 ip4:103.27.34.46 +a +mx +ip4:43.241.54.89 ~all" "MS=ms59508959"
Cheers,
-- Adi Pircalabu