Hi Chris,

Did you save any of the SMTP logs for those messages that were re-delivered and email headers?

Eric

On 7/17/2020 7:09 PM, Chris wrote:
As soon as I have something useful from recordio I'll post it.

On Thu, Jul 16, 2020 at 6:54 AM Eric Broch <[email protected] <mailto:[email protected]>> wrote:

    Can you tell me what the log shows for one of these messages?

    On 7/15/2020 12:42 PM, Eric Broch wrote:

    And, what version of qmail?

    On 7/15/2020 12:41 PM, Eric Broch wrote:

    Did you turn on recordio?

    On 7/15/2020 11:33 AM, Boheme wrote:
    Nope. It’s insanely random.

    -Sent from my Pip-Boy 3000

    On 16/07/2020, at 5:27 AM, Eric Broch
    <[email protected]> <mailto:[email protected]> wrote:

    

    Can you repeat this error at will?

    On 7/10/2020 2:15 AM, Chris wrote:
    I've disabled spamdyke, the source of the 421 timeout error;
    but I'm still getting re-delivery of emails.  Not as
    frequently, but I've received the same two emails a dozen
    times today.

    Has anyone else experienced this before?

    -Chris

    On Tue, Jun 30, 2020 at 7:30 AM Chris <[email protected]
    <mailto:[email protected]>> wrote:

        A few nights ago I shut down the VM that my qmailtoaster
        runs on, bumped the memory up to 4g, and restarted it. 
        First reboot in a long while, so I was nervous. 
        Everything seemed fine.

        The next day I noticed that there were a couple of emails
        I had deleted that had re-appeared.  I'd delete them
        again, and they'd come back again.  My mail client shows
        date sent and date received, and they were definitely all
        the same sender time.  Checking the logs, I see the same
        set of email being re-accepted in
        /var/log/qmail/smtp/current over and over.

        Finally I have a clue.  Gmail sent me a delivery warning
        about one of the emails, as it was a test message from
        myself, and it says my server is responding with error:

        421 Timeout. Talk faster next time.

        So it seems the email is getting accepted, but then the
        sending server is given an error 421, so it queues it up
        for re-delivery.

        Any suggestions on what I should be looking at to figure
        this out?

        -Chris

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