Hi, i'm using qmail 1.03 with tcpserver 0.88 and i have problems with some clients (mostly Windows/Outlook) sending mail through the qmail-MTA, which is very slow on those client machines, but there are also clients (the majority) with the same configuration, which operates about 6-7 times faster. I'm using the following tcpserver setup for qmail-smtpd: (ulimit -d 5120 -m 2048 && /usr/local/bin/tcpserver -v -c20 -x /home/vpopmail/etc/tcp.smtp.cdb -u 1001 -g 101 0 smtp /var/qmail/bin/qmail-smtpd) i have also tried the -H and -R tcpserver options to disable dns/ident lookups, but that did not solve the problem. The vpopmail uses the roaming feature appending new pop3-authenticated relay ip's to tcp.smtp.cdb Qmail runs on a Debian GNU/Linux 2.2 system with kernel 2.2.17 Thanks for your help, Oliver -- Oliver Stosberg * [EMAIL PROTECTED] * Fon: +49 5251 930328