Hi everyone,
Our customers report to us problems with duplicate e-mails.
Problem is in termination SMTP connection. I think that typical SMTP connection looks subsequently:
220 mail.astaro.gw.com ESMTP ready.
helo alda.sender.com
250 mail.astaro.gw.com Hello alda.sender.com [X.X.X.X]
mail from:
250 OK
rcpt to:
250 Accepted
data
354 Please start mail input.
test message
.
250 Mail queued for delivery.
But sometimes Astaro's smtp proxy server unconfirmed end mark . ("period") and doesn't sent acknowledged message "250 Mail queued for delivery."
In that case outgoing SMTP server sents this identical message again !!!
In this time I don't know why sometimes Astaro's smtp proxy server this acknowledged message send and sometimes not.
Can you help me please ?
Thank you
Alda
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