Sounds like Imail is temporarily blacklisting it. The only way to stop that is to restart the SMTP service. You may want to look at the logs on that machine to see what is going on.
Travis -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Goran Jovanovic Sent: Thursday, July 22, 2004 7:38 AM To: [EMAIL PROTECTED] Subject: [IMail Forum] Odd SMTP Connect Problem OK this is very weird. I am running IMail 8.10 and am seeing the following. There is a secondary MX record for one of the domains that I service. Someone seems to be sending to it directly and so it sends me a lot of mail for this domain (this is not a problem in my mind). The problem is that the SMTP service stops accepting mail from this (and only this IP address) at random times. It can work for hours and then fail and the next time I restart the service it will work for minutes, completely unpredictable. I have done a packet trace at my end and I see: Them sending a SYN I send and ACK They send an ACK Then I send a FIN So we never get to the banner being sent out or the helo coming in. There is nothing in the log even with debug and verbose turned on. >From that point on SMTP will not accept a connection from that IP address. But, it gets better, all other IPs can connect to the SMTP server and still get their mail through. If the other ISP uses another machine in the same IP block that machine can connect no problem. I have increased the SMTP setting for Delay between recipients to 500 milliseconds but this seems to have no effect. This is a dedicated machine to IMail. Does anyone have any ideas on what this might be and how to fix it? Goran Jovanovic The LAN Shoppe To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
