Hi,
this morning a strange problem start on my qmailtoaster server, the SMTP
service become really slow.
Al the other service (pop3, imap, submission port)
are still ok.
I've restarted a couple of times the server and I tried also to
disable rbls, spf, spamdike, clamav and spamassassin but nothing changed.
There
is nothing strange in the logs, and I haven't done any update or modification
on the server.
If i try to connect to the port 25 with a telnet session the
connectiion is established quickly but when I type helo no response comes from
server, only a couple of minutes later it will respond to the command ....
>From
my test seems that the problem deal with CHKUSER wich is really slow (from the
smtp/current log I see that there is a big delay between the accepted
connection and the chkuser response) but I don't know how to investigate
further.
Fabio
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