> nk11p00mm-mx006.me.com.smtp: Flags [S], seq 3314275386, win 1400, > options [mss 1460,nop,wscale 6,sackOK,TS val 170874802 ecr 0], > length 0 > E..<.e@.@..........r.d.....:.......x............... [...]
> I then did a capture of a telnet session to the same server on port 25: > > reading from file telnet.cap, link-type EN10MB (Ethernet) > 2014-05-03 22:35:14.821306 IP smtp.bestwny.com.58803 > > nk11p00-smtp-mx003.mac.com.smtp: Flags [S], seq 3396279601, win > 65535, options [mss 1460,nop,wscale 6,sackOK,TS val 171198862 ecr > 0], length 0 > E..<t.@.@.C........2.....o.1....................... Wound you mind trying to remove "tcp_windowsize = 1400" from you configuration (do not forget to issue a "postfix reload" afterwards!)? Stefan
