[Dovecot] Overloading IMAP Server

[Harford, Ken]

Okay, I set a wait period of 30 seconds and I am still having issues.

I am sending about 50 messages from 6 servers (300 messages) to the same
IMAP mailbox at the same time and dovecot doesn't seem to be able handle
that kind of message count.

I am using dovecot delivery instead of postfix delivery

Any other ideas?

Thanks

Ken



On 1/22/13 4:04 AM, "Steffen Kaiser" <skdovecot at smail.inf.fh-brs.de> wrote:

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>On Mon, 21 Jan 2013, Harford, Ken wrote:
>
>>            I am having an issue with dovecot IMAP reading and writing
>>to 
>> one specific mailbox. I have a check email delivery script that sends
>
>What's the purpose of the verification:
>
>+ The prompt delivery?
>
>+ The delivery at all?
>
>+ The correct delivery?
>
>> out a email and then logs into dovecot to check if the mailbox that the
>> message has been delivered to. However, the servers that send these
>> messages send them in bunches depending on how many postfix spools it
>>is 
>> checking. So I could get 60 messages all being sent to 1 mailbox and
>> then having to read that same mailbox to check if the message actually
>> got delivered.
>>
>> I am getting a lot of  errors such as the following:
>>
>> Could not connect to IMAP server
>> imap failed: IMAP RECEIVE CRITICAL - Could not select INBOX
>
>Is this an error logged by Dovecot?
>
>> Any ideas as to what I can tweak in dovecot to allow these messages to
>>be verified.
>
>a)
>Wait a bit before logging into the IMAP server and check the messages
>sequentionally, not in parallel. E.g. your script could synchronize
>itself 
>with other parallel instances by a shared lock.
>
>b)
>Use mail_log and a script on the mail server monitoring Dovecot logs and
>register delivered message ids and/or recipient. Then figure out a good
>way to probe, if one pariticular message has been seen.
>- -or-
>make note of message id/recipient on the sender side, somehow push (ssh
>or 
>something) that information on regular basis to the mail server, where a
>script verifies that data.
>
>c) To verify the correct delivery: use some sort of checksumming.
>
>Kind regards,
>
>- -- 
>Steffen Kaiser
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