hi all I've installed qmail package on my Linux Red Hat Linux release 6.1 (Cartman) 2.2.12-20 on an i586 - a year ago. Everything works fine - I get mail from outside - except of 2 known addresses. When they try to send a message to me they get an error from their SMTP server : from the first sender : ############################## --- Session Transcript --- MX-record resolution of [praxell.com] in progress (DNS Server: 192.116.202.99)... P=010 D=praxell.com TTL=(1387) MX=[relay.praxell.com] {194.90.98.14} Attempting MX: P=010 D=praxell.com TTL=(1387) MX=[relay.praxell.com] {194.90.98.14} Attempting SMTP connection to [194.90.98.14 : 25] Waiting for socket connection... Socket connection established Waiting for protocol initiation... 30 second wait for protocol timeout exceeded. This message is 60 minutes old; it has 0 minutes left in this queue Primary queue lifetime exceeded; message placed in retry queue --- End Transcript --- ############################### from the second sender: ######################## ----- Transcript of session follows ----- 451 <[EMAIL PROTECTED]>... reply: read error from relay.praxell.com. <[EMAIL PROTECTED]>... Deferred: Connection reset by relay.praxell.com. Warning: message still undelivered after 4 hours Will keep trying until message is 5 days old ########################## I used the tcpdump and saw that a connection did established but no data was received: 15:19:10.740037 eth0 > relay.praxell.com.smtp > 62.90.58.229.45046: P 4275379217:4275379268(51) ack 1575305908 win 31740 (DF) 15:20:04.988847 eth0 < 62.90.58.229.45046 > relay.praxell.com.smtp: F 1:1(0) ack 0 win 24840 (DF) 15:20:04.988935 eth0 > relay.praxell.com.smtp > 62.90.58.229.45046: . 51:51(0) ack 2 win 31740 (DF) 15:21:10.740044 eth0 > relay.praxell.com.smtp > 62.90.58.229.45046: P 0:51(51) ack 2 win 31740 (DF) 15:21:11.093894 eth0 < 62.90.58.229.45046 > relay.praxell.com.smtp: R 1575305909:1575305909(0) win 24840 (DF) anyone can tell me what's wrong? thanks in advance.