hello,

We are currently using logsat spamfilter , we are recieving about 1million mail every day , now we have a several mailservers.

My question then we are takeing 1 mailserver offline for some service e.t.c, will logsat spamfilter save mail that not can be delivery and automatic deliver then the mailerver goes online again?



Regards,

Peter forslund sweden

Peter,

SpamFilter will keep in a queue all emails to be delivered to your mail servers if they are offline. It will attempt to re-deliver all emails in this queue every hour, indefinetly (both of these settings are configurable) until the server comes back online.

However once your server is back online, all emails in the queue will be delivered at once, using a limited number of simultaneous connections to your server (the limit is one-half of tha value of the "Maximum incoming connections" setting). If the server has been offline for several hours, the number of emails queued can grow to be quite large, and the delivery may be placing a large stress on your mail server. You'll need to configure your "Maximum concurrent incoming connections" settings to a value that will be suitable to your server's hardware.

If the server will be offline for several hours, you may want to consider bringing SpamFilter offline as well. This will cause the senders to automatically retry delivery of their messages. Most servers will re-attempt re-delivery multiple times before sending a message to their senders.

Deciding which of these options to choose is going to be your choice, depending on how much downtime you expect to have.

Everyone,

This may be a strange coincidence, but just yesterday we found (and improved) a user-reported performance issue when flushing the queue, especially over slow links to the SMTP server. Basically the CPU could spike to 100% for a split instant on a fast link, and for up to 5 seconds over a 56kbps connection, when running the flush procedure for each email processed. We've tested an improved build with the customer, and have effectively reduced from 100% down to 1%-2% the CPU peak. Build 2.7.1.525 is in the registered user  area right now with the improvement.

Dan, I believe this would have greatly reduced your CPU load this morning.


Edited by LogSat

Thanks guys!