>Limiting has nothing to do with  "Spam". Increase the limit to 10.

Fritz,

You misunderstood my post.  By legitimate, I meant other servers that we
would be expecting the occasional email from.  For example, one of the IP
addresses which showed up as having its connections limited was a vendor
running sendmail as their MTA.  They would generally have no reason to queue
up more than 5 simultaneous connections to our MTA and would be expected to
properly terminate their connection when finished, unlike many spam bots.

We did not receive a single message from this vendor, the messages were
rejected immediately.  Restarting ASSP apparently reset the connection
counters and allowed mail to be transferred for a while.  I believe this
might only be happening to certain senders because of greylisting; if
they're being greylisted and the connection counter is never decremented
when they disconnect, then under certain circumstances with enough retries
during the embargo time, they could wind up never being able to send us an
email, which is what appears to have happened.

My apologies, it was late and I assumed that the developer audience here
would understand my brief message but I definitely should have explained it
better.

Actually, I did set it to 10 last night and I'm seeing more of the same in
the log this morning:

Apr-17-14 09:53:10 Limiting 199.122.123.0 connections to 10;
Apr-17-14 09:53:35 Limiting 198.2.129.0 connections to 10;
Apr-17-14 09:55:07 Limiting 208.95.132.0 connections to 10;
Apr-17-14 09:55:44 Limiting 207.67.38.0 connections to 10;
Apr-17-14 09:56:03 Limiting 68.232.203.0 connections to 10;

Meanwhile, the web interface tells me:
Concurrent SMTP Sessions:       0 (4 high / 64 max)

So as I understand it, according to ASSP there has been a maximum of 4
concurrent sessions, yet it's limiting these IPs to 10 concurrent
connections.

- Phil



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