Delay when sending SMTP mail

hi,

since some time (months now, i can't remember when it started) i have a delay about 10-15 seconds long when i send mail with SMTP. the bat log says:

03.12.2009, 18:10:51: SEND - sending mail message(s) - 1 message(s) in queue
03.12.2009, 18:10:51: SEND - connected to SMTP server
03.12.2009, 18:11:03: SEND - authenticating (plain)...
03.12.2009, 18:11:03: SEND - sending message to xxx
<03.12.2009, 18:11:04: SEND - message to xxx sent (648 bytes)
03.12.2009, 18:11:04: SEND - connection finished - 1 message(s) sent

i looked at the transfer with wireshark and found that after the initial TCP handshake the server sends a 220 response which is ACKed and then there is a 12 second pause until i see my side (the client) send an EHLO packet. after that the transfer runs smoothly.

my question is: what is causing this 12 second delay? how can i avoid it?

any help is appreciated. i can be reached by mail as well as lueders and then this little round symbol and afterwards the domain of cfos.de.

.chris

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Marek Ulko Beginner Posts: 8 Points: 4 Rating: 0 Authority: 0 Joined: 30 November 2009	#2 0 03 December 2009 23:54:05 I had similar problem. I had no DNS address and DNS alternative in XP TCP/IP of connection (Internet LAN Gate). Setting it helped.

chris lueders User Posts: 16 Points: 12 Rating: 1 Authority: 1 Joined: 22 December 2005	#3 0 04 December 2009 12:26:29 that is not the case here. i am on a router and if i open a session in a browser there is no delay. plus, thw wireshark trace shows that the delay is after the SMTP connection has been established, so i can hardly be a DNS problem, i think. i just tested one other thing: the problem is the same with a different mail server. so it seems it doesn't hinge on the server.