Re: [exim] increase in smtp concurrency

On Wed, 12 Sep 2007, John Horne wrote:

| On Fri, 2007-09-07 at 14:56 +0100, Chris Edwards wrote:
| > Anyone else noticing more concurrent incoming SMTP connections in last
| > couple of weeks ?
| >
| May I ask do you mean concurrent as in from the same sending host, or
| simply that you are receiving more connections generally than usual?

Hard to say - probably both.

More connections generally, but quite a few hosts with multiple
connections too (we currently limit this to 5).

What seemed to be new was connections hanging around after getting 5xx at
RCPT time. Hence "drop" more effective than "deny".

However, it kinda looks like in last few days less of this is happening.
Perhaps spammy has modified the botnet, again...

--
Chris Edwards, Glasgow University Computing Service