Trog wrote:
On Fri, 2004-03-26 at 15:44, Nigel Horne wrote:Not my sendmail. There are milters that do it and sendmail 8.13.0 looks like it will have some kind of tarpitting.
The evidence points to incoming connections taking a long time (minutes) to send the first line of header after establishing a connection.so clamd gives up waiting. Increasing clamd's timeout will help. I have seen 4-5 minutes between an SMTP connection being established and the conversation finally getting around to doing a DATA statement.
The only reason I can think off for something like this, is that maybe sendmail is tar-pitting the connection and deliberately adding a delay.
Does sendmail have tar-pitting these days?
Do you have a tcpdump of such a conversation?Nope. That might be doable.
-trog
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