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Internet SMTP connector delivery failure 'The connection was dropped due to an SMTP protocol event sink.'

Posted on 2006-10-25
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Last Modified: 2007-12-19
Hi

I've got this problem that only this one message gets stuck in the internet SMTP connector queue event sink errors preventing other messages from going out.

If I understand it correctly exchange creates instances of the message for every recipient and places that in the queue. So if there are 11 recipients in the To... box there should reflect 11 messages in the queue. But when I view the queue there are only 10 messages and retry deliveries are already on 12 retries. Freeze these 10 that retries with SMTP protocol event sink errors and my other mail goes through fine.

Any ideas?

Runnig Exchange server 2003 Version 6.5 (Build 7638.2 : Service Pack 2) installed on a Windows Server Std 2003 SP2, with GFI MailEssentials 12.0 and GFI MailSecurity 10.0.
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Question by:unluckynelson
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by:Sembee
ID: 17802677
That depends on the SMTP Connector configuration.
If the SMTP Connector is configured to use DNS for delivery then it should send each message.
If the SMTP Connector is configured to use a smart host then Exchange will send the single message with all of the email addresses to the smart host and let that handle its delivery.

Simon.
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by:unluckynelson
ID: 17803433
Hey Simon...

It's me again, looks like I'm having a different problem today, this time the queue internet SMTP connector is having retry errors, unlike yesterday where the pending submission queue was very slow to process...

I'm still using a smart host, I'm just scared of putting it over to dns, this flooded my users with NDR's and nothing went out. Should I be bold and try that again?

I don't think the bulk email is the issue, it's just selective emails that hangs with SMTP protocol sink errors, the queue resumes once these are frozen. A lot of mail does go out.



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Sembee earned 1000 total points
ID: 17804071
As you are using a smart host, the smart host is probably throttling your traffic. You should probably ask the ISP or whoever provides the smart host that you are using if this is the case.

Simon.
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