.... goes out to Don Drake & the others for all of their patience and effort.
This post goes out as an FYI incase anyone runs into a problem similiar. My xmail server system couldn't connect to a specific smtp server. Infact, telnetting to the IP on port 25 got me nowhere. I spent the better part of three days trying to figure it out. Don recommended a tcpdump into a temp file. I did that and noticed among other things: 01:34:06.896745 berwynlibrary.net.32823 > SLSINET.SLS.LIB.IL.US.smtp: SWE 1074364022:1074364022(0) win 5840 <mss 1460,sa$ I did't know what the SWE flags stood for -- so I look 'em up on tcpdump's mailing list. Turns out the remote server in this case is trying to use ECN tcp packets. That's what the W and E flags in the tcpdump tell me. (The S is for SYN). My linux system was defaultly setup to deny the use of this type of packet hence why I couldn't connect at all to the remote smtp server. The post http://www.tcpdump.org/lists/workers/2001/06/msg00080.html was a godsend. A quick edit to rc.local - echo 0 > /proc/sys/net/ipv4/tcp_ecn gave me everything i needed. Now mail to that remote smtp server and any others that use ECN packets works perfectly. Thanks for everybodies assistance. Jim F. gave - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
