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Queue issue side effects

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    Posted: 21 May 2003 at 10:54am

Because the queue doesn't resend queued mail until you stop and restart the service in the current version, we have discovered another issue...

If you restart the service and receive inbound mail for one of your domains other than the primary domain (first listed on the setting page I guess), it forward the mail AUTOMATICALLY to that primary smtp server instead of routing it to the appropriate server.

My guess is that the product is not reloading the domain list IMMEDIATELY before accepting inbound connections...  It will continue to forward to the wrong server until you stop and start the service again (and again) until no inbound mail occurs during the start up period.... after which it works as it should...

On startup the product shouldn't accept inbound connections until it has reloaded all appropriate lists and is fully prepared...  If it is doing this, it doesn't appear to be working...

Roy

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Post Options Post Options   Thanks (0) Thanks(0)   Quote LogSat Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 2003 at 12:25pm

Roy,

We have double-checked the code to see the order in which events occur, and they are as follows.

  • All settings in INI file and local lists are loaded, including alternative routes for local domain list
  • SMTP port is opened and incoming connections are accepted
  • Mail in queue is processed for delivery

I tried to replicate the problem by having an smtp stress tool send mass emails to SpamFilter with the SpamFilter shut off. The emails are for a domain that has an alternate destination smtp address and port in the domain list. As soon as it incoming conns are accepted, SpamFilter did route them to the alternate domain, not the primary listed under the main settings tab.

Are you absolutely sure that it is not behaving as it should, and that ALL emails are being redirected to the main smtp server? If you're using a build earlier than .122, we just made available on the website the public build .122, could you see if the problem occurs with that as well?

Roberto Franceschetti
LogSat Software

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Post Options Post Options   Thanks (0) Thanks(0)   Quote RBarrow Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 2003 at 12:30pm

Roberto,

I think we have found another issue which may be the root cause of this problem as well... When we receive an email with multiple addresses, it is routed to the default server instead of the one in the list for that domain... we have duplicated this problem with several domains.

It appears that the default server was maxed on the smtp connections which caused these messages to queue...a common occurance on the Notes box... made it appear to be a queue issue...

Does this help?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote LogSat Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 2003 at 1:38pm

You are correct on this one, we were able to duplicate it. When there are multiple recipients, the email is forwarded "as-is" to the destination server for the domain of the first recipient. This is because SpamFilter is sending the message as it arrives.

If it arrives as an email with all the recipients specified using multiple RCPT TO, this is how they are delivered, to one destination smtp server with multple RCTP TOs. If it arrives as one separate email for each recipient, SpamFilter will send one single email per recipient to the appropriate (the correct one in this case since there is only one) destination smtp server.

Different SMTP servers can send mail to multiple reicipients in both ways, either with one single transmission specifying multiple RCPT TOs in one session, or as separate sessions each with one RCPT TO. SpamFilter simply duplicates this behavior. Changing it is not going to be easy and simple, but we'll see what we can do.

Roberto Franceschetti
LogSat Software

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rbarrow Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2003 at 5:26pm

Roberto...

The emails that are being misrouted contain ONLY addresses to the single domain...but multiple recipients in that domain... The domain in question is not the default domain.

This has been moved to another thread....

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