Server is most likely unable to do a reverse DNS lookup on those clients.
Jon
On Wed, 27 Jun 2001, Grant wrote:
> Qmail has been working perfectly up until yesterday. What I did was:
>
> echo 10485760 > /var/qmail/control/databytes and restarted qmail.
>
> While this is nothing major, ever since yesterday _some_ clients have been
> reporting timeouts on sending emails.
>
> I telnet from the clients machine to port 25 of the mail server and I get
> nothing. Whereas if I telnet locally to port 25 I get:
>
> Trying 127.0.0.1...
> Connected to localhost.localdomain.
> Escape character is '^]'.
> 220 webster.conprojan.com.au ESMTP
>
> ps auwwx shows:
>
> root 29681 0.0 0.1 1124 92 ? S 11:58 0:00 svscan
> root 29682 0.0 0.0 1088 52 ? S 11:58 0:00 supervise
> qmail-send
> root 29683 0.0 0.0 1088 52 ? S 11:58 0:00 supervise
> log
> root 29684 0.0 0.0 1088 52 ? S 11:58 0:00 supervise
> qmail-smtpd
> root 29685 0.0 0.0 1088 52 ? S 11:58 0:00 supervise
> log
> qmails 29686 0.0 0.3 1140 240 ? S 11:58 0:01 qmail-send
> qmaill 29687 0.0 0.0 1100 0 ? SW 11:58 0:00 [multilog]
> root 29688 0.0 0.0 1152 60 ? S 11:58 0:00
> /usr/local/bin/tcpserver -H -R -x /etc/tcp.smtp.cdb -u id -u qmaild -g id
> -g qmaild 0 smtp /var/qmail/bin/qmail-smtpd
> qmaill 29689 0.0 0.4 1104 264 ? S 11:58 0:00
> /usr/local/bin/multilog t /var/log/qmail
> root 29692 0.0 0.1 1100 72 ? S 11:58 0:00
> qmail-lspawn ./Maildir
> qmailr 29693 0.0 0.1 1100 100 ? S 11:58 0:00
> qmail-rspawn
> qmailq 29694 0.0 0.1 1092 92 ? S 11:58 0:00 qmail-clean
>
> It suggests to be a resolving issue. But I haven't changed anything else
> except for databytes.
>
