Casey Bralla via plug on 5 Dec 2023 07:17:27 -0800

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[PLUG] OpenSMTPD RFC 2822 Error

I'm building an OpenSMTPD mailer server in a virtualbox test environment.  The test environment has a Bind9 DNS service running that recognizes as a valid domain.  The test OpenSMTPD mail server is listed in the DNS as the mail server for that domain.

I'm at the initial testing phase, but getting an RFC 2822 error.  As far as I can tell, my message is RFC 2822 compliant, but OpenSMTPD seems to disagree.

Can anybody see what I'm doing wrong?  Here is my test sequence:

telnet localhost 25
Trying ::1...
Connected to localhost.
Escape character is '^]'.
220 T-Mail ESMTP OpenSMTPD
250-T-Mail Hello [::1], pleased to meet you
250-SIZE 36700160
250 HELP
mail from: <>
250 2.0.0 Ok
rcpt to: <>
250 2.1.5 Destination address valid: Recipient ok
354 Enter mail, end with "." on a line by itself
date: Tue, 2023-12-05 10:13:00 AM
from: <>
subject: Test
This is a test eMail.
550 5.7.1 Delivery not authorized, message refused: Message is not RFC 2822 compliant

The logs don't add any additional detail about the error.

As far as I can tell, RFC 2822 mandates a "date:" and "From: " field in the message data block.  I think I've got those present.  However, OpenSMTPD is notoriously persnickety about following the RFCs.

Can anybody see what I'm doing wrong?


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