Sendmail and Unexpected EOM

Denis Beauchemin Denis.Beauchemin at
Thu Nov 1 21:18:43 GMT 2007

Scott Silva a écrit :
> I'm getting a lot of collect: premature EOM: unexpected close
> errors from certain servers, and a google gives me much conflicting info.
> Running CentOS 4 and current stable MailScanner.
>  I have tried decreasing the MTU on the external interface, and only 
> succeeded in stopping all traffic. Tried disabling window scaling, and 
> that also had no effect. Could the default be to set no-fragment on 
> packets from CentOS 4?

I modified these TCP settings in RHEL5 to correct this situation:
(from /etc/rc.local):
/sbin/sysctl -w net.ipv4.tcp_wmem="4096 16384 131072"
/sbin/sysctl -w net.ipv4.tcp_rmem="4096 87380 174760"

For some unknown reason it wouldn't work in /etc/sysctl.conf...


  °v°   Denis Beauchemin, analyste
 /(_)\  Université de Sherbrooke, S.T.I.
  ^ ^   T: 819.821.8000x62252 F: 819.821.8045

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