Good day!



I am setting up an email list for my local community (just myself right now).  Being a nerd, I am using Amazon SES to send and receive emails.  I have mailman installed on ec2 (using "pip install mailman") and it is working well enough to send an email to the list with


/opt/mailman/venv/bin/mailman inject -f <somefile>a...@mymaillist.org



SES is putting incoming mail into an S3 bucket, one file per email. Using a small python program, I use the above command to send them to the list.

When I add a user (like myself) I get a welcome email from all-requ...@mymaillist.org.  When I respond, the mail arrives  in the S3 bucket, but I do not know how to give it to mailman3.  The "inject" command will not work because there is no "all-request" mailing list.


How do I feed these administrative mails to mailman3?


Thank you.


-----

I have tried netcat the email to the ?LMTP? port, but it fails:

(venv) [ec2-user@ip-10-0-3-253 mailman]$ nc localhost 8024 < 
/tmp/pbTw1oqmV1rZtHXV707Jcov264hr
220 ip-10-0-3-253.ec2.internal GNU Mailman LMTP runner 2.0
500 Error: command "RECEIVED-SPF:" not recognized
500 Error: command "AUTHENTICATION-RESULTS:" not recognized
500 Error: command "" not recognized
500 Error: command "" not recognized
502 5.5.1 Too many unrecognized commands, goodbye.


here is what the first few lines of an email file look like.  (Some values have been changed)

Received-SPF: pass (spfCheck: domain of lahnakoski.com designates 8.8.8.8 as 
permitted sender) client-ip=8.8.8.8;envelope-from=k...@lahnakoski.com; 
helo=cichlid.ash.relay.mailchannels.net;
Authentication-Results: amazonses.com;
 spf=pass (spfCheck: domain of lahnakoski.com designates 8.8.8.8 as permitted 
sender) client-ip=8.8.8.8;envelope-from=k...@lahnakoski.com; 
helo=cichlid.ash.relay.mailchannels.net;
 dkim=failheader.i=@lahnakoski.com;
 dmarc=none header.from=lahnakoski.com;
Return-Path:<k...@lahnakoski.com>
Received: from cichlid.ash.relay.mailchannels.net 
(cichlid.ash.relay.mailchannels.net [8.8.8.8])
 by fips.wmjb.mail-manager-smtp.amazonaws.com with ESMTPS id 
p78l98r6nfp05h5lbb24phnsrovpcomu57smml81
 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384)
 for<all-requ...@mymaillist.org>; Sun, 09 Mar 2025 15:13:30 +0000 (UTC)
...

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